Exercise of the muscles keeps the body in health, and exercise of the brain brings peace of mind.

Cultivate all your faculties; you must either use them or lose them

It is sad, indeed, to see how man wastes his opportunities. How many could be made happy, with the blessings which are recklessly wasted or thrown away.

The important thing is not so much that every child should be taught, as that every child should have the opportunity of teaching itself. What does it matter if the pupil know a little more or a little less? A boy who leaves school knowing much, but hating his lessons, will soon have forgotten all he ever learned; while another who had acquired a thirst for knowledge, even if he had learned little, would soon teach himself more than the first ever knew.

Do what you will, only do something.

Those who have not distinguished themselves at school need not on that account be discouraged. the greatest minds do not necessarily ripen the quickest.

We may sit in our library and yet be in all quarters of the earth.