Evil (n.) is easy, and has infinite forms.
Evil (n.) always comes from a single cause, man's inability to sit still in a room.
Evil (n.) is never committed so fully and joyfully as when it is done for religious convictions.
Evil (n.) is easily discovered ; there is an Infinite variety ; good is almost unique. But some kinds of evil are almost as difficult to discover as that which we call good; and often particular evil of this class passes for good. It needs even a certain greatness of soul to attain to this, as to that which is good.
Evil (n.) can be done with a clean conscience once one learns to 'direct the intention': the casuist lets a gentleman duel or kill so long as he fixes his mind on defending his honour, not on the killing.