For good is simple, evil manifold.
Doubt is the beginning of wisdom
All human happiness and misery take the form of action.
One may go wrong in many different ways, but right only in one, which is why it is easy to fail and difficult to succeed.
A tragedy is a representation of an action that is whole and complete and of a certain magnitude. A whole is what has a beginning and middle and end.
Courage is the first virtue that makes all other virtues possible.