Mathematics is an obscure field, an abstruse science, complicated and exact; yet so many have attained perfection in it that we might conclude almost anyone who seriously applied himself would achieve a measure of success.

As I approve of a youth that has something of the old man in him, so I am no less pleased with an old man that has something of the youth. He that follows this rule may be old in body, but can never be so in mind.

What then is freedom? The power to live as one wishes.

It is our duty, my young friends, to resist old age.

Cultivation to the mind is as necessary as food to the body.

I will go further, and assert that nature without culture can often do more to deserve praise than culture without nature.

It is a man's own dishonesty, his crimes, his wickedness, and boldness, that takes away from him soundness of mind; these are the furies, these the flames and firebrands, of the wicked.