“Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.”

Learning is the only thing the mind never exhausts, never fears, and never regrets.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

Nature never breaks her own laws.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

The knowledge of all things is possible.

Poor is the pupil who does not surpass his master.

I am not poor. Poor are those who desire many things.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

Art lives from constraints and dies from freedom.

A diamond is just a lump of coal that stuck to its job.

Nothing can be loved or hated unless it is first understood.

Being willing is not enough. We must do.

The five senses are the ministers of the soul.

Art is never finished, only abandoned.

Reprove your friend in secret and praise him openly.

Where the spirit does not work with the hand, there is no art.

Those who’ll play with cats must expect to be scratched.

If the government can set aside some spot for a elk to be a elk without being bothered, or a buffalo to be a buffalo without being shot down, there ought to be some place where a Negro can be a Negro without being Jim Crowed.

Each portion of matter may be conceived of as a garden full of plants, and as a pond full of fishes. But each branch of the plant, each member of the animal, each drop of its humors, is also such a garden or such a pond.

A tool is usually more simple than a machine; it is generally used with the hand, whilst a machine is frequently moved by animal or steam power.

Person who chases two rabbits catches neither.

And here I am, dying in my bed, like cattle die. May the eyes of cowards never sleep.

You can put wings on a pig, but you don’t make it an eagle.

A man that is not afraid of a Lion is afraid of a Cat .