Galatians 6:4

4.But let every man prove his own work. By a powerful blow, Paul has already struck down the pride of man. But it frequently happens that, by comparing ourselves with others, the low opinion which we form of them leads us to entertain a high opinion of ourselves. Paul declares that no such comparison ought to be allowed. Let no man, he says, measure himself by the standard of another, or please himself with the thought, that others appear to him less worthy of approbation. Let him lay aside all regard to other men, examine his own conscience, and inquire what is his own work. It is not what we gain by detracting from others, but what we have without any comparison, that can be regarded as true praise.

Some consider Paul to be speaking in irony. “Thou flatterest thyself by a comparison with the faults of others; but if thou wilt consider who thou art, thou wilt then enjoy the praise which is justly due to thee.” In other words, no praise whatever shall be thine; because there is no man by whom the smallest portion of praise is really deserved. In conformity with this view, the words that follow, every man shall bear his own burden, are supposed to mean, that it is usual for every man to bear his own burden. But the plain and direct sense of the words agrees better with the apostle’s reasoning. “With respect to thyself alone, and not by comparison with others, thou wilt have praise.” I am well aware that the next sentence, which annihilates all the glory of man, has been regarded as justifying the ironical interpretation. But the glorying of which this passage treats, is that of a good conscience, in which the Lord allows his people to indulge, and which Paul elsewhere expresses in very animated language.

“Paul earnestly beholding the council, said, Men and brethren, I have lived in all good conscience before God until this day.”
(Acts 23:1.)

This is nothing more than an acknowledgment of Divine grace, which reflects no praise whatever on man, but excites him to give God the glory. Such a reason for glorying do the godly find in themselves; and they ascribe it, not to their own merits, but to the riches of the grace of God.

“For our rejoicing is this, the testimony of a good conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world.”
(2 Corinthians 1:12.)

Our Lord himself instructs us:

“But thou, when thou prayest, enter into thy closet; and when thou hast shut thy door, pray to thy Father who is in secret; and thy Father, who seeth in secret, shall reward thee openly.”
(Matthew 6:6.)

Strictly speaking, he makes no assertion, but leads us to conclude, that, when a man is valued for his own worth, and not for the baseness of others, the praise is just and substantial. The statement is therefore conditional, and imports that none are entitled to be regarded as good men, who are not found to be so, apart from the consideration of others.