Matthew Henry (source)
II. The encouragement which we have to proceed in the ways of godliness, and to exercise ourselves to it, notwithstanding the difficulties and discouragements that we meet with in it. He had said (v. 8) that it is profitable for all things, having the promise of the life which now is. But the question is, Will the profit balance the loss? For, if it will not, it is not profit. Yes, we are sure it will. Here is another of Paul's faithful sayings, worthy of all acceptation—that all our labours and losses in the service of God and the work of religion will be abundantly recompensed, so that though we lose for Christ we shall not lose by him. Therefore we labour and suffer reproach, because we trust in the living God, v. 10. Observe,
1. Godly people must labour and expect reproach; they must do well, and yet expect at the same time to suffer ill: toil and trouble are to be expected by us in this world, not only as men, but as saints.
2. Those who labour and suffer reproach in the service of God and the work of religion may depend upon the living God that they shall not lose by it. Let this encourage them, We trust in the living God. The consideration of this, that the God who has undertaken to be our pay-master is the living God, who does himself live for ever and is the fountain of life to all who serve him, should encourage us in all our services and in all our sufferings for him, especially considering that he is the Saviour of all men. (1.) By his providences he protects the persons, and prolongs the lives, of the children of men. (2.) He has a general good-will to the eternal salvation of all men thus far that he is not willing that any should perish, but that all should come to repentance. He desires not the death of sinners; he is thus far the Saviour of all men that none are left in the same desperate condition that fallen angels are in. Now, if he be thus the Saviour of all men, we may hence infer that much more he will be the rewarder of those who seek and serve him; if he has such a good-will for all his creatures, much more will he provide well for those who are new creatures, who are born again. He is the Saviour of all men, but especially of those that believe; and the salvation he has in store for those that believe is sufficient to recompense them for all their services and sufferings. Here we see, [1.] The life of a Christian is a life of labour and suffering: We labour and suffer. [2.] The best we can expect to suffer in the present life is reproach for our well-doing, for our work of faith and labour of love. [3.] True Christians trust in the living God; for cursed is the man that trusts in man, or in any but the living God; and those that trust in him shall never be ashamed. Trust in him at all times. [4.] God is the general Saviour of all men, as he has put them into a salvable state; but he is in a particular manner the Saviour of true believers; there is then a general and a special redemption.
John Gill (source)
For therefore we both labour
Not in the word and doctrine, though they did; nor in the exercise of internal godliness, though there is a work in faith, and a labour in love; nor with their own hands, at their trades and business, to support themselves, and others; but by enduring hardships and afflictions, as stripes, imprisonment, weariness, pain, watchings, fastings, hunger, thirst, cold, and nakedness; see ( 2 Corinthians 11:23-27 ) .
And suffer reproach;
with patience and cheerfulness. The Alexandrian copy, and another manuscript, read, "we strive"; or contend even to an agony, combating with sin, Satan, and the world, with profane men, and with false teachers; and to all this they were animated by the promises made to godliness; and therefore they showed it by their practices, or rather by their sufferings, that they believed it to be a true and faithful saying; and which is further conferred by what follows:
because we trust in the living God;
for the accomplishment of the said promises, who has power, and therefore can, and is faithful, and therefore will, make good what he has promised; and since it is life he has promised, faith is the more encouraged to trust in him, since he is the living God, in opposition to, and distinction from, lifeless idols; he has life in himself, essentially, originally, and independently, and is the author and giver of life, natural, spiritual, and eternal, unto others. Wherefore there is good reason to trust in him for the fulfilling of the promises of the present and future life, made unto godliness.
Who is the Saviour of all men;
in a providential way, giving them being and breath, upholding them in their beings, preserving their lives, and indulging them with the blessings and mercies of life; for that he is the Saviour of all men, with a spiritual and everlasting salvation, is not true in fact.
Specially of those that believe;
whom though he saves with an eternal salvation; yet not of this, but of a temporal salvation, are the words to be understood: or as there is a general providence, which attends all mankind, there is a special one which relates to the elect of God; these are regarded in Providence, and are particularly saved and preserved before conversion, in order to be called; and after conversion, after they are brought to believe in Christ, they are preserved from many enemies, and are delivered out of many afflictions and temptations; and are the peculiar care and darlings of providence, being to God as the apple of his eye: and there is a great deal of reason to believe this, for if he is the Saviour of all men, then much more of them who are of more worth, value, and esteem with him, than all the world beside; and if they are saved by him with the greater salvation, then much more with the less; and if he the common Saviour of all men, and especially of saints, whom he saves both ways, then there is great reason to trust in him for the fulfilment of the promises of life, temporal and eternal, made to godliness, and godly persons. This epithet of God seems to be taken out of ( Psalms 17:7 ) where he is called ([Hebrew text did not copy]) , "the Saviour of them that trust", or believe.
John Calvin (source)
10 For in this we both labor and suffer reproaches This is an anticipation by which he solves that question, "Are not believers the most miserable of all men, because they are oppressed by tribulations of every kind?" In order to show, therefore, that their condition must not be judged from outward appearance, he distinguishes them from others, first in the cause, and next in the result. Hence it follows, that they lose nothing of the promises which he has mentioned, when they are tried by adversity. The sum is, that believers are not miserable in afflictions, because a good conscience supports them, and a blessed and joyful end awaits them.
Now, since the happiness of the present life consists chiefly of two parts, honor and conveniences, he contrasts them within two evils, toils and reproach, meaning by the former words, inconveniences and annoyances of every kind, such as poverty, cold, nakedness, hunger, banishments, spoliations, imprisonments, scourgings, and other persecutions.
We have hope fixed on the living God This consolation refers to the cause; for so far are we from being miserable, when we suffer on account of righteousness, that it is rather a just ground of thanksgiving. Besides, our afflictions are accompanied by hope in the living God, and, what is more, hope may be regarded as the foundation; but it never maketh ashamed, (Romans 5:5,) and therefore everything that happens to the godly ought to be reckoned a gain.
Who is the Savior [76] This is the second consolation, though it depends on the former; for the deliverance of which he speaks may be viewed as the fruit of hope. To make this more clear, it ought to be understood that this is an argument drawn from the less to the greater; for the word soter [77] is here a general term, and denotes one who defends and preserves. He means that the kindness of God extends to all men. And if there is no man who does not feel the goodness of God towards him, and who is not a partaker of it, how much more shall it be experienced by the godly, who hope in him? Will he not take peculiar care in them? Will he not more freely pour out his bounty on them? In a word, will he not, in every respect, keep them safe to the end?
[76] "The word Savior is not here taken in what we call its proper and strict meaning, in regard to the eternal salvation which God promises to his elect, but it is taken for one who delivers and protects. Thus we see that even unbelievers are protected by God, as it is said (Matthew 5:46) that "he maketh his sun to shine on the good and the bad;" and we see that all are fed by his goodness, that all are delivered from many dangers. In this sense he is called "the Savior of all men," not in regard to the spiritual salvation of their souls, but because he supports all his creatures. In this way, therefore, our Lord is the Savior of all men, that is, his goodness extends to the most wicked, who are estranged from him, and who do not deserve to have any intercourse with him, who ought to have been struck off from the number of the creatures of God and destroyed; and yet we see how God hitherto extends his grace to them; for the life which he gives to them is a testimony of his goodness. Since, therefore God shows such favor towards those who are strangers to him, how shall it be with us who are members of his household? Not that we are better or more excellent than those whom we see to be cast off by him, but the whole proceeds from his mercy and free grace, that he is reconciled to us through our Lord Jesus Christ, since he hath called us to the knowledge of the gospel, and then confirms us, and seals his bounty toward us, so that we ought to be convinced that he reckons us to be his children. Since, therefore, we see that he nourishes those who are estranged from him, let us go and hide ourselves under his wings; for, having taken us under his protection, he has declared that he will show himself to be a Father toward us." -- Fr. Ser.
[77] "Le mot Grec que nous traduisons Sauveur." -- "The Greek word which we translate Savior."
Matthew Poole (source)
1 Timothy 4:10
For therefore we both labour and suffer reproach, because we trust in the living God, who is the Saviour of all men, specially of those that believe.
If we did not believe this as a faithful saying, that godliness is profitable for all things, and trust in God, who liveth for ever, to see to the fulfilling of it, to what purpose should
we labour and suffer reproach as we do; labouring in the work of God, suffering reproach in the cause of God, and for living godly lives, worshipping God according to his will, and denying ourselves in sensual satisfactions and sensible enjoyments, that we might fulfil the law of Christ?
Objection. But, will some say: how then is godliness profitable for all things, how doth the faithfulness of the promises for this life annexed to godliness appear, if those that profess it must labour and suffer reproach?
Solution. Labour for God is a reward to itself, our honour, not our burden, his service is perfect freedom: the promises of this life, annexed to godliness, are not promises of sensual rest and ease, but of inward peace, satisfaction, and support of other things, only with a reserve to the Divine wisdom and judgment, so far forth as our heavenly Father shall see it fit for his glory and our good; yet they are not vain, for God,
who is the Saviour, that is, the Preserver,
of all men, the Preserver of man and beast, as the psalmist speaketh, is in a more especial manner the Saviour
of those that believe, Psalm 33:18,19. This seemeth rather to be the sense of the text, than to understand it of eternal salvation, for so God is not the actual Saviour of all; besides that the text seemeth to speak of a work proper to the Father, rather than to the Son.
Other interesting commentary:
John Samson at Monergism.com (source)