An idea that is developed and put into action is more important than an idea that exists only as an idea.

It is the supreme art of the teacher to awaken joy in creative expression and knowledge.

Experience is the best teacher, but she sends in a high bill.

You cannot step twice into the same river, for other waters are continually flowing in.

Talent hits a target no one else can hit; Genius hits a target no one else can see.

Science without religion is lame, religion without science is blind.

I have spoken.