John Calvin Reformed @genevareformer

12. Now if any man build upon this foundation He pursues still farther the metaphor. It would not have been enough to have laid the foundation if the entire superstructure did not correspond; for as it were an absurd thing to raise a structure of vile materials on a foundation of gold, so it were greatly criminal to bury Christ under a mass of strange doctrines.

Matthew Henry Presbyterian @wholebiblehenry

Here the apostle informs us what foundation he had laid at the bottom of all his labours among them - even Jesus Christ, the chief corner-stone, Eph 2:20. Upon this foundation all the faithful ministers of Christ build. Upon this rock all the Christians found their hopes. Those that build their hopes of heaven on any other foundation build upon the sand.

Commenting on 1 Corinthians 3:11-15

John Gill Reformed Baptist @doctorgill

Now if any man build upon this foundation,.... The different materials laid by one and the same man, on this foundation, or the different doctrines advanced upon it, are some of them comparable to gold, silver, precious stones; for their intrinsic worth and value; for the purity and sincerity of them; for their weight, importance, solidity, and substantiality; for their durableness; for the great esteem...