The energy of the mind is commensurate with the work to be done.

A man is the whole encyclopedia of facts.

Never miss an opportunity of noticing anything of beauty ...

Man exists for his own sake and not to add a laborer to the state.

The sower may mistake and sow his peas crookedly; the peas make no mistake, but come up and show his line.

Real action is in silent moments.

What lies behind us and what lies before us are tiny matters compared to what lies within us.