There is nothing good or evil save in the will.

Whenever you are angry, be assured that it is not only a present evil, but that you have increased a habit

There is nothing evil save that which perverts the mind and shackles the conscience.

To do nothing evil is good; to wish nothing evil is better.

If there is anything worse than evil, it is nothingness. At least evil has a form, and a voice, and a purpose, however depraved. Perhaps some good can even come out of evil: a terrible deed of violence against someone weaker may lead others to act in order to ensure that such a deed is not perpetrated again, whereas before they might have been unaware of the reasons why an individual might behave in such a way, or they might simply have chosen to ignore them. And evil, as we saw with the Blacksmith, always contains within itself the possibility of its own redemption. It is not evil that is the enemy of hope: it is nothingness.

Evil prospers when good men do nothing.