1 Corinthians 8:9-13

Only be careful that this liberty of yours [this power to choose] does not somehow become a stumbling block [that is, a temptation to sin] to the weak [in conscience]. For if someone sees you, a person having knowledge, eating in an idol’s temple, then if he is weak, will he not be encouraged to eat things sacrificed to idols [and violate his own convictions]? For through your knowledge (spiritual maturity) this weak man is ruined [that is, he suffers in his spiritual life], the brother for whom Christ died. And when you sin against the brothers and sisters in this way and wound their weak conscience [by confusing them], you sin against Christ. Therefore, if [my eating a certain] food causes my brother to stumble (sin), I will not eat [such] meat ever again, so that I will not cause my brother to stumble.