Have a definite, clear, practical ideal - a goal, an objective.

All men naturally desire knowledge. An indication of this is our esteem for the senses; for apart from their use we esteem them for their own sake, and most of all the sense of sight. Not only with a view to action, but even when no action is contemplated, we prefer sight, generally speaking, to all the other senses. The reason of this is that of all the senses sight best helps us to know things, and reveals many distinctions.

To give away money is an easy matter and in any man's power. But to decide to whom to give it and how large and when, and for what purpose and how, is neither in every man's power nor an easy matter.

He who cannot see the truth for himself, nor, hearing it from others, store it away in his mind, that man is utterly worthless.

Wishing to be friends is quick work, but friendship is a slow ripening fruit.

The structural unity of the parts is such that, if any one of them is displaced or removed, the whole will be disjointed and dis­turbed. For a thing whose presence or absence makes no visible difference is not an organic part of the whole.

Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for his goals.