To such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which is exactly like another; and not only among the plants, but among the boughs, the leaves and the fruits, you will not find one which is exactly similar to another.

Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.

Not to appreciate life, all of life, is not to deserve it.

Who sows virtue ought to reap honour.

I have been impressed with the urgency of doing.

Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer.

Sculptured figures which appear in motion, will, in their standing position, actually look as if they were falling forward.