For if any man see thee which hast knowledge sit at meat in the idol's temple, shall not the conscience of him which is weak be emboldened to eat those things which are offered to idols;
If any man - being weak.
Which hast knowledge. The very knowledge thou pridest thyself on (1 Corinthians 8:1) will lead him after thy example to do that against his conscience which thou doest without scruple of conscience-namely, to eat meats offered to idols.
Conscience of him which is weak - `seeing that he is weak.'
Emboldened - literally, built up. You ought to build up your brother in good; but by your example your building up is the emboldening him to violate conscience.