It is always easier to fight for one's principles than to live up to them.

The educator must believe in the potential power of his pupil, and he must employ all his art in seeking to bring his pupil to experience this power.

There is only one reason for an individual to side-step to the useless side : the fear of a defeat on the useful side.

Courage is not an ability one either possess or lacks. Courage is the willingness to engage in a risk-taking behavior regardless of whether the consequences are unknown or possibly adverse. We are capable of courageous behavior provided we are willing to engage in it. Given that life offers few guarantees, all living requires risk-taking.

The human mind shows an urge to capture into fixed forms through unreal assumptions, that is, fictions, that which is chaotic, always in flux, and incomprehensible. Serving this urge, the child quite generally uses a scheme in order to act and to find his way. We proceed much the same when we divide the earth by meridians and parallels, for only thus do we obtain fixed points which we can bring into a relationship with one another.

We must interpret a bad temper as a sign of inferiority.

The only worthwhile achievements of man are those which are socially useful.