Sinning against thy brother in knowledge is sinning against Christ.

1Corinthians 8"But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.Howbeit there is not in every man that knowledge: for some with conscience of the idol unto this hour eat it as a thing offered unto an idol; and their conscience being weak is defiled.But meat commendeth us not to God: for neither, if we eat, are we the better; neither, if we eat not, are we the worse.But take heed lest by any means this liberty of your's become a stumblingblock to them that are weak.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;And through thy knowledge shall the weak brother perish, for whom Christ died?But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ." If your knowledge influences a week brother to go in week mind and sin, you are responsible for his sin.