Science may set limits to knowledge, but should not set limits to imagination.

A man is literally what he thinks.

Property is surely a right of mankind as real as liberty.

One who deceives will always find those who allow themselves to be deceived.

It is necessary to keep one's compass in one's eyes and not in the hand, for the hands execute, but the eye judges.

Energy may be likened to the bending of a crossbow; decision,to the releasing of a trigger.

And no one will listen to us until we listen to ourselves.

One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.

If you don't like someone's story, write your own.

Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy.

Strength does not come from physical capacity. It comes from an indomitable will.

It takes a great man to be a good listener.

He who is slowest in making a promise is most faithful in its performance.

One new feature or fresh take can change everything.

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

If we do not lay out ourselves in the service of mankind whom should we serve?

Things which matter most must never be at the mercy of things which matter least.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

He who conquers others is strong; he who conquers himself is mighty.

The weak can never forgive. Forgiveness is the attribute of the strong.