Ideas and Opinions
by Albert Einstein
From Message in Honor of Morris Raphael Cohen:
The results were not presented as read-made, but scientific curiosity was first aroused by presenting contrasting possibilities of conceiving the matter.
... The intellectual honesty of the author makes us share the inner struggle in his mind. It is thi which is the mark of the born teacher. Knowledge exists in two forms--lifeless, stored in books, and alive in the consciousness of men. The second form of existence is after all the essential one; the first, indispensable as it may be, occupies only an inferior position.