As any action or posture, long continued, will distort and disfigure the limbs, so the mind likewise is crippled and contracted by perpetual application to the same set of ideas.

One should always think of what one is about; when one is learning, one should not think of play; and when one is at play, one should not think of one's learning.

A straight path never leads anywhere except to the objective.

It is in self-limitation that a master first shows himself.

When you are at sea, keep clear of the land.

There's some end at last for the man who follows a path: mere rambling is interminable.