Albert Barnes Commentary 1 Corinthians 3:14

"If any man`s work shall abide which he built thereon, he shall receive a reward." — 1 Corinthians 3:14 (ASV)

If any man's work abide, etc. This means that his work abides if, first, it appears that he has taught the true doctrines of Christianity, inculcated right practices and views of piety, and himself cherished right feelings. Second, it abides if the trial of the great day, when the real qualities of all objects will be known, will show this.

He shall receive a reward, according to the nature of his work. (See Barnes on 1 Corinthians 3:8).

This refers, I suppose, to the proper rewards on the day of judgment, and not to the honours and the recompense which he may receive in this world. If all that he has taught and done will be proved to have been genuine and pure, then his reward will be in proportion.