One had to immerse oneself in one's surroundings and intensely study nature or one's subject to understand how to recreate it.

Everything in nature takes its form from the sphere, the cone and the cylinder.

I could paint for a hundred years, a thousand years without stopping and I would still feel as though I knew nothing.

I ask you to pray for me, for once age has overtaken us, we find consolation only in religion.

The day is coming when a single carrot, freshly observed, will set off a revolution.

If I think, everything is lost.

We must not be content to memorize the beautiful formulas of our illustrious predecessors. Let us go out and study beautiful nature.