If I have had any success, it's due to luck, but I notice the harder I work, the luckier I get.

Thinking is one thing no one has ever been able to tax.

99 percent of success is built on failure.

Whenever you look at a piece of work and you think the fellow was crazy, then you want to pay some attention to that. One of you is likely to be, and you had better find out which one it is. It makes an awful lot of difference.

Obsolescence is a factor which says that the new thing I bring you is worth more than the unused value of the old thing.

One fails forward toward success.

Learn how to fail intelligently.