I can calculate the motion of heavenly bodies, but not the madness of people.

If you treat people right they will treat you right - ninety percent of the time.

Strong minds discuss ideas, average minds discuss events, weak minds discuss people.

Sometimes you put walls up not to keep people out, but to see who cares enough to break them down.

I no longer listen to what people say, I just watch what they do. Behavior never lies.

The things most people want to know about are usually none of their business.