One who faces and who fears the right things and from the right motive, in the right way and at the right time, posseses character worthy of our trust and admiration.

The soul of animals is characterized by two faculties, (a) the faculty of discrimination which is the work of thought and sense, and (b) the faculty of originating local movement.

You are what you do repeatedly.

Philosophy begins with wonder.

You can never learn anything that you did not already know

It is of the nature of desire not to be satisfied, and most men live only for the gratification of it.

The investigation of the truth is in one way hard, in another easy. An indication of this is found in the fact that no one is able to attain the truth adequately, while, on the other hand, no one fails entirely, but everyone says something true about the nature of all things, and while individually they contribute little or nothing to the truth, by the union of all a considerable amount is amassed.