A dirty joke is a sort of mental rebellion

Be curious, not judgmental.

Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding. Hold this picture tenaciously and never permit it to fade. Your mind will seek to develop this picture!

Happiness doesn't depend on any external conditions, it is governed by our mental attitude

Happiness is mental harmony; unhappiness is mental inharmony.

I believe in the fundamental truth of all great religions of the world.

I can feel guilty about the past, apprehensive about the future, but only in the present can I act. The ability to be in the present moment is a major component of mental wellness.

It is only because of problems that we grow mentally and spiritually.

Love is a serious mental disease.

Mastery of the emotions is fundamental to a virtuous life.

Success is neither magical nor mysterious. Success is the natural consequence of consistently applying the basic fundamentals.

We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.

When every physical and mental resource is focused, one's power to solve a problem multiplies tremendously.