The one person who has more illusions than the dreamer is the man of action.

What difference is there, do you think, between those in Plato's cave who can only marvel at the shadows and images of various objects, provided they are content and don't know what they miss, and the philosopher who has emerged from the cave and sees the real things?

A hallucination is a fact, not an error; what is erroneous is a judgment based upon it.

It isn't safe to sit in judgment upon another person's illusion when you are not on the inside. While you are thinking it is a dream, he may be knowing it is a planet.

Pray look better, Sir... those things yonder are no giants, but windmills.

Therefore trust to thy heart, and to what the world calls illusions.

For what we call illusions are often, in truth, a wider vision of past and present realities --a willing movement of a man's soul with the larger sweep of the world's forces --a movement towards a more assured end than the chances of a single life.

What seems to be, is, to those to whom it seems to be, and is productive of the most dreadful consequences to those to whom it seems to be, even of torments, despair, eternal death.

It is respectable to have no illusions, and safe, and profitable and dull.

The impression forces itself upon one that men measure by false standards, that everyone seeks power, success, riches for himself, and admires others who attain them, while undervaluing the truly precious thing in life.