It is the customer who pays the wages. If you take all the experience and judgment of men over fifty out of the world, there wouldn't be enough left to run it. Thinking is the hardest work there is, which is probably the reason so few engage in it. There are two fools in this world. One is the millionaire who thinks that by hoarding money he can somehow accumulate real power, and the other is the penniless reformer who thinks that if only he can take the money from one class and give it to another, all the world's ills will be cured.
Failure is the opportunity to begin again, more intelligently.
Even a mistake may turn out to be the one thing necessary to a worthwhile achievement. You can't build a reputation on what you're going to do. I cannot discover that anyone knows enough to say definitely what is and what is not possible. People can have the Model T in any colour - so long as it's black. History is more or less bunk.