The professionals resemble and recognize each other by virtue of the stigmata that their trade has left upon them. They are like the dog in the fable, whose collar has made an indelible mark around his neck. The amateur is the shaggy wolf whom no dog had better trust too far.

Teaching is not a lost art, but the regard for it is a lost tradition.

I once worked as a salesman and was very independent. I took orders from no one.

Above all, do not talk yourself out of good ideas by trying to expound them at haphazard meetings.

Vanity is a static thing. It puts it faith in what it has, and is easily wounded. Pride is active, and satisfied only with what it can do, hence accustomed not to feel small stings.

To denounce does not free the self from what it hates, any more than ignoring the past shuts off its influence.

The book, like the bicycle, is a perfect form.