People are never so likely to be wrong as when they are organized. And they never have so little freedom. Perhaps that is why the people at large keep their freedom. People can be manipulated only when they are organized.

Under pressure, the mouth speaks when the brain is disengaged, and, sometimes unwittingly, the gearshift is in reverse when it should be in neutral.

If someone betrays you once, it is his fault. If he betrays you twice, it is your fault. Blessed are those who can laugh at themselves, they will never cease to be amused. Obstacles are those frightful things you see when you take your eyes off your goals.

Exercise is bunk. If you are healthy, you don't need it: if you are sick you should not take it.

Anyone who stops learning is old — whether this happens at twenty or at eighty. Anyone who keeps on learning not only remains young but becomes constantly more valuable — regardless of physical capacity.

There is no man living that can not do more than he thinks he can.

Thinking without constructive action becomes a disease.