Invisible is real. Souls have their own world.

Every man has seen the wall that limits his mind.

We live in an age of universal investigation, and of exploration of the sources of all movements.

From this, without doubt, sprang the fable. Man created it thus, because it was not given him to see more than himself and nature, which surrounds him; but he created it true with a truth all its own.

The study of social progress is to-day not less needed in literature than is the analysis of the human heart.

Doubt is the freedom of thought. Any claim to truth can be doubted.

What is a great life but a youthful intention carried out in maturity?