No Roman ever died in contemplation over a geometrical diagram.

Our reasonings grasp at straws for premises and float on gossamers for deductions.

Youth is life as yet unblemished by much tragedy, but hardly by TV.

Error itself may be happy chance.

Whenever a text-book is written of real educational worth, you may be quite certain that some reviewer will say that it will be difficult to teach from it. Of course it will be difficult to teach from it. It it were easy, the book ought to be burned.

In a sense, knowledge shrinks as wisdom grows, for details are swallowed up in principles. The details for knowledge which are important, will be picked up ad hoc in each avocation of life, but the habit of the active utilization of well-understood principles is the final possession of WISDOM.

Dogmatism is the anti-Christ of learning.