The most valuable of all education is the ability to make yourself do the thing you have to do, when it has to be done, whether you like it or not.

The most distressing thing that can happen to a prophet is to be proved wrong. The next most distressing thing is to be proved right.

You shall know the truth, and the truth shall make you mad.

Like every other good thing in this world, leisure and culture have to be paid for. Fortunately, however, it is not the leisured and the cultured who have to pay.

The most valuable thing you can make is a mistake - you can't learn anything from being perfect.

Perhaps the most valuable result of al education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not.