The young people of today think of nothing but themselves. They have no reverence for parents or old age. They are impatient of all restraint. They talk as if they alone knew everything and what passes for wisdom with us is foolishness with them. As for girls, they are forward, immodest and unwomanly in speech, behaviour and dress.

Few people think more than two or three times a year; I have made an international reputation for myself by thinking once or twice a week.

That's been one of my mantras - focus and simplicity. Simple can be harder than complex: You have to work hard to get your thinking clean to make it simple. But it's worth it in the end because once you get there, you can move mountains.

Even people who aren't geniuses can outthink the rest of mankind if they develop certain thinking habits.

The trouble with most people is that they quit before they start.

I am neither bitter nor cynical but I do wish there was less immaturity in political thinking.