For this is good and acceptable before God. After having taught that what he enjoined is useful, he now brings forward a stronger argument -- that it pleases God; for when we know what is His will, this ought to have the force of all possible reasons. By good he means what is proper and lawful; and, since the will of God is the rule by which all our duties must be regulated, he proves that it is right because it pleases God. This passage is highly worthy of observation; and, first, we draw from it the general doctrine, that the true rule for acting well and properly is to look to the will of God, and not to undertake anything but what he approves. Next, there is likewise laid down a rule for godly prayer, that we should follow God as our leader, and that all our prayer should be regulated by his will and command. If due force had been allowed to this argument, the prayers of Papists, in the present day, would not have abounded with so many corruptions. For how will they prove that they have the authority of God for having recourse to dead men as their intercessors, or for praying for the dead? In short, in all their form of prayer, what can they point out that is pleasing to God?

For this is good and acceptable - That is, it is good and acceptable to God that we should pray for all people. The reason is, that he desires their salvation, and hence it is agreeable to him that we should pray for it. If there were no provision made for their salvation, or if he was unwilling that they should be saved, it could not be agreeable to him that we should offer prayer for them.

This is good and acceptable - Prayer for all legally constituted authorities is good in itself, because useful to ourselves and to the public at large, and it is acceptable in the sight of God our Savior; and this is its highest sanction and its highest character: it is good; it is well pleasing to God.

(3) For this [is] good and acceptable in the sight of God our Saviour;
(3) Another argument, why churches or congregations ought to pray for all men, without any difference of nation, type, age, or order: that is, because the Lord by calling of all types, indeed sometimes those that are the greatest enemies to the Gospel, will have his Church gathered together after this manner, and therefore prayer is to be made for all.

For this is good and acceptable in the sight of God our Saviour. Not only to live peaceably and quietly under the government men are, since that is the ordination of God, and to live soberly, righteously, and godly, which his grace teaches; but to pray for all sorts of men, and for those who are set in the highest place of government, even though enemies and persecutors: this is good in itself, and in the sight of an omniscient God, who sees not as man seeth; and it is acceptable unto him through Jesus Christ, by whom every sacrifice of prayer or praise is so; for by God our Saviour is meant God the Father, who is the Saviour of all men, in a way of providence, and the Saviour of all the elect in a way of special grace; See Gill on 1-Timothy 2:1.

this--praying for all men.
in the sight of God--not merely before men, as if it were their favor that we sought (2-Corinthians 8:21).
our Saviour--a title appropriate to the matter in hand. He who is "our Saviour" is willing that all should be saved (1-Timothy 2:4; Romans 5:18); therefore we should meet the will of God in behalf of others, by praying for the salvation of all men. More would be converted if we would pray more. He has actually saved us who believe, being "our Saviour." He is willing that all should be saved, even those who do not as yet believe, if they will believe (compare 1-Timothy 4:10; Titus 2:11).

For this. This custom of praying for rulers. Our prayers should be as comprehensive as the will of God to save.
Who will have all men to be saved. The Scriptures uniformly represent it as the divine will that all should come to life. But he does not will to save men irrespective of the conditions of salvation. They must, in order to be saved, come to a knowledge of the truth. In other words, must hear, receive, and obey the gospel.

For this - That we pray for all men. Do you ask, "Why are not more converted?" We do not pray enough. Is acceptable in the sight of God our Saviour - Who has actually saved us that believe, and willeth all men to be saved. It is strange that any whom he has actually saved should doubt the universality of his grace!