When you truly study top performers in any field, what sets them apart is not their physical skill; it is how they control their minds.

Intellectual growth is when you surpass the barrier of puerility, puzzling people with your dazzling creativity.

This is peculiarly an age in which each of us may, if he do but search diligently, find the literature suited to his mental powers.

Show Holmes a drop of water and he would deduce the existence of the Atlantic. Show it to me and I would look for a tap. That was the difference between us.

In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light...

has no guts,” doesn’t it?