"It is a very delicate job to forgive a man, without lowering him in his own estimation, and yours too"

This quote suggests that forgiving a person for their errors or misbehaviors can be an uphill struggle. It is necessary to do so in a way that does not diminish their personality or self-respect, in addition to maintaining your very own self-esteem. Forgiveness must come from a place of understanding and compassion, rather than stricture.