“There are no incurable diseases – only the lack of will. There are no worthless herbs – only the lack of knowledge.”

The world is divided into men who have wit and no religion and men who have religion and no wit.

Width of life is more important than length of life.

The more brilliant the lightning, the quicker it disappears.

Leeches should be kept a day before applying them. They should be squeezed to make them eject the contents of their stomachs.

I [prefer] a short life with width to a narrow one with length.

In God alone, essence (what He is) and existence (that he is) coincide.

An ignorant doctor is the aide-de-camp of death.

Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings, if it has had causes and beginnings; nor completed except by knowledge of its accidents and accompanying essentials.

It is in the nature of water … to become transformed into earth through a predominating earthy virtue; … it is in the nature of earth to become transformed into water through a predominating aqueous virtue.

Is it the fault of wine if a fool drinks it and goes stumbling into darkness?

As to the mental essence, we find it in infants devoid of every mental form.

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.

When you do not know the nature of the malady, leave it to nature; do not strive to hasten matters. For either nature will bring about the cure or it will itself reveal clearly what the malady really is.

The different sorts of madness are innumerable.

That whose existence is necessary must necessarily be one essence.

Those who deny the first principle should be flogged or burned until they admit that it is not the same thing to be burned and not burned, or whipped and not whipped.

The best teacher is not the one who knows most but the one who is most capable of reducing knowledge to that simple compound of the obvious and wonderful.

All true knowledge of God is born out of obedience.

But the upside of painful knowledge is so much greater than the downside of blissful ignorance.

Knowledge comes, but wisdom lingers, and I linger on the shore, And the individual withers, and the world is more and more.

Words are like Leaves; and where they most abound, Much Fruit of Sense beneath is rarely found.

The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

A little learning is a dangerous thing.

To sustain an environment suitable for man, we must fight on a thousand battlegrounds. Despite all of our wealth and knowledge, we cannot create a redwood forest, a wild river, or a gleaming seashore.