Make your work to be in keeping with your purpose.

Study without desire spoils the memory, and it retains nothing that it takes in.

There are three classes of people: those who see, those who see when they are shown, those who do not see.

A wave is never found alone, but is mingled with the other waves.

You can have no dominion greater or less than that over yourself.

As you cannot do what you want, want what you can do.

In time and with water, everything changes.

He who thinks little errs much.

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

Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.

Tears come from the heart and not from the brain.

There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.

You do ill if you praise, but worse if you censure, what you do not understand.

A well-spent day brings happy sleep.

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

Iron rusts from disuse, stagnant water loses its purity, and in cold weather becomes frozen; even so does inaction sap the vigors of the mind.

He who truly knows has no occasion to shout.

Beyond a doubt truth bears the same relation to falsehood as light to darkness.

Every action needs to be prompted by a motive.