... one pets what one degrades; and one has to support what one has enfeebled

There's nothing final about a mistake, except its being taken as final.

Curiosity is the only thing that really carries through time, isn't it? The creative curiosity, I mean, which fights its way into expression?

When we refuse to accept our limitations, Nature, who is a stern realist, pays us out.

I wonder how often not the intention but the desire springs up in a doctor's mind: 'Can I let this human being out of the trap of Life?

Personally, I think it's a good way to let a child start right in with the laws of Nature before he's old enough to be surprised at them.

To see a shadow and think it is a tree that is a pity; but to see a tree and to think it a shadow can be fatal.