Charity is that rational and constant affection which makes us sacrifice ourselves to the human race, as if we were united with it, so as to form one individual, partaking equally in its adversity and prosperity.
When you serve your mother and father it is okay to try to correct them once in a while. But if you see that they are not going to listen to you, keep your respect for them and don't distance yourself from them. Work without complaining.
In archery we have something like the way of the superior man. When the archer misses the center of the target, he turns round and seeks for the cause of his failure in himself.