The cheerful mind perseveres and the strong mind hews its way through a thousand difficulties.

It is the calm, forgiving, equable, well-balanced mind that does the greatest amount of work.

The infinite library of the Universe is in your mind.

Happiness depends more upon the internal frame of a person's own mind than on the externals in the world.

The empires of the future are the empires of the mind.

The mind is everything. What you think you become.