The one exclusive sign of thorough knowledge is the power of teaching – Aristotle

We become just by performing just action, temperate by performing temperate actions, brave by performing brave action – Aristotle

To run away from trouble is a form of cowardice and, while it is true that the suicide braves death, he does it not for some noble object but to escape some ill – Aristotle

Excellence is an art won by training and habituation. We do not act rightly because we have virtue or excellence, but we rather have those because we have acted rightly. We are what we repeatedly do. Excellence, then, is not an act but a habit – Aristotle

Education is an ornament in prosperity and a refuge in adversity – Aristotle

The greatest virtues are those which are most useful to other persons – Aristotle