Deep thoughts seldom find refuge in shallow minds.

The greatest fortress in the universe is an ignorant mind; not even the highest thought can leap over it.

Bad mind, bad life. Good mind, good life. Excellent mind, excellent life.

The mind is everything; you can go no higher than what you put into it.

The mind is like a razor; it only works when sharp.

God is the world's oldest philosopher; love is the world's oldest sage.