Catechism of the Catholic Church

Some rules apply in every case: (1756, 1970, 1827, 1971) - One may never do evil so that good may result from it; - the Golden Rule: "Whatever you wish that men would do to you, do so to them." - charity always proceeds by way of respect for one's neighbor and his conscience: "Thus sinning against your brethren and wounding their conscience... you sin against Christ." Therefore "it is right not to... do anything that makes your brother stumble."