What you receive from others is a testimony to their virtue; but all that you do for others is the sign and clear indication of your own.

There is one basic cause of all effects.

My son, I do not say these are foals and those asses, these little monkeys and those great baboons, as you would have me do. As I told you from the first, I regard them as earth's heroes. But I do not wish to believe them without cause, nor to accept those propositions whose antitheses (as you must have understood if you are not both blind and deaf) are so compellingly true.

All things are in the Universe, and the universe is in all things: we in it, and it in us; in this way everything concurs in a perfect unity.

Nature is none other than God in things. Animals and plants are living effects of Nature; whence all of God is in all things. Think thus, of the sun in the crocus, in the narcissus, in the heliotrope, in the rooster, in the lion.

I have declared infinite worlds to exist beside this our earth. It would not be worthy of God to manifest Himself in less than an infinite universe.

There is in the universe neither center nor circumference.