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Twenty-two is just such a random age. It's a little blah.

I saw that nothing was permanent. You don't want to possess anything that is dear to you because you might lose it.

Twenty can't be expected to tolerate sixty in all things, and sixty gets bored stiff with twenty's eternal love affairs.

The older view of the nature of heat was that it is a substance, very fine and imponderable indeed, but indestructible, and unchangeable in quantity, which is an essential fundamental property of all matter.

And for me there's still more material than 20 lifetimes that I can use up.

There is a difference between twenty-nine and thirty. When you are twenty-nine it can be the beginning of everything. When you are thirty it can be the end of everything.

The only things that are really permanent are love, family, friendship, and that is a lesson. At the end of the day, that's really what it boils down to. The rest of it is just stuff.

The infinite variety in the properties of the solid materials we find in the world is really the expression of the infinite variety of the ways in which the atoms and molecules can be tied together, and of the strength of those ties.

That which you create in beauty and goodness and truth lives on for all time to come. Don't spend your life accumulating material objects that will only turn to dust and ashes.