Impassioned reason

The immoral pragmatism involved in making a living by corrupting the young is so ghastly that it can only be sustained by completely separating theory from practice. When you want to keep doing bad things, you must separate your self-justifying theories from your empirical actions, otherwise your guilt and self-hatred will arise and compel you to change your behaviour. You must numb your conscience by repeating over and over that morality has nothing to do with practicality – but only because the practicality that you have chosen is completely immoral.

Highly recommended.