First, have a definite, clear practical ideal; a goal, an objective. Second, have the necessary means to achieve your ends; wisdom, money, materials, and methods. Third, adjust all your means to that end.

A king ruleth as he ought, a tyrant as he lists, a king to the profit of all, a tyrant only to please a few.

For it is owing to their wonder that men both now begin and at first began to philosophize... They were pursuing science in order to know, and not for any utilitarian end.

The guest will judge better of a feast than the cook

For through wondering human beings now and in the beginning have been led to philosophizing.

Also, that which is desirable in itself is more desirable than what is desirable per accidens.

The energy or active exercise of the mind constitutes life.