According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon.
1 Corinthians 8:9
But take heed lest by any means this liberty of your's become a stumblingblock to them that are weak.
1 Corinthians 10:12
Wherefore let him that thinketh he standeth take heed lest he fall.