The other day I posted about the importance of acting in accord with a well-formed conscience. To that point, I just came across this quotation from Pascal, “One never does evil so fully and joyfully as when one does it by a false principle of conscience.”
Truth. One small example: the joy we get by defending our good name against the smallest slight from someone else, by attacking their good name. “It’s matter of justice!!!!” In the end, our good name is certainly damaged, but it turns out to be a self-inflicted wound.