Astonishing things can be done with the human memory if you will devote it faithfully to one particular line of business.

Training- training is everything; training is all there is to a person. We speak of nature; it is folly; there is no such thing as nature; what we call by that misleading name is merely heredity and training. We have no thoughts of our own, no opinions of our own; they are transmitted to us, trained into us.

Dates are hard to remember because they consist of figures; figures are monotonously unstriking in appearance, and they don't take hold, they form no pictures, and so they give the eye no chance to help. Pictures are the thing. Pictures can make dates stick.

Learning to play two pairs is worth about as much as a college education, and about as costly.

Crowds stand around all day long and criticise that bridge, and find fault with it, and tell with unlimited frankness how it ought to have been planned, and how they would have built it had the city granted them the $14,000 it cost. It is really refreshing to hang around these and listen to them. A foreigner would come to the conclusion that all America was composed of inspired professional bridge builders.

When you ascend the hill of prosperity, may you not meet a friend.

I always take Scotch whiskey at night as a preventive of toothache. I have never had the toothache; and what is more, I never intend to have it.