I think that's what really a substantial work is, it's forever. It's the truth now and it was the truth then, and it will be the truth tomorrow.
Another flaw in the human character is that everybody wants to build and nobody wants to do maintenance.
Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.
It is a rare privilege to watch the birth, growth, and first feeble struggles of a living mind; this privilege is mine.
