Tobacco is the only excuse for Columbus's misadventure in discovering America.

Where id was, there ego shall be.

The virtuous man contents himself with dreaming that which the wicked man does in actual life.

The individual does actually carry on a double existence: one designed to serve his own purposes and another as a link in a chain, in which he serves against, or at any rate without, any volition of his own.

When a love-relationship is at its height there is no room left for any interest in the environment; a pair of lovers are sufficient to themselves

There is little that gives children greater pleasure than when a grown-up lets himself down to their level, renounces his oppressive superiority and plays with them as an equal.

A state of consciousness is characteristically very transitory; an idea that is conscious now is no longer so a moment later, although it can become so again under certain conditions that are easily brought about.