All is riddle, and the key to a riddle is another riddle.

Life is a festival only to the wise.

Wisdom has its root in goodness, and not goodness its root in wisdom.

He that writes to himself writes to an eternal public.

There are books which take rank in your life with parents and lovers and passionate experiences, so medicinal, so stringent, so revolutionary, so authoritative.

To be great is to be misunderstood. Pythagoras was misunderstood, and Socrates, and Jesus, and Luther, and Copernicus, and Galileo, and Newton, and every pure and wise spirit that ever took flesh.

We are always getting ready to live but never living.

The sky is the ultimate art gallery just above us.

You can take better care of your secret than another can.

Men are what their mothers made them.