Intelligence is the wife, imagination is the mistress, memory is the servant.

Reason is intelligence taking exercise. Imagination is intelligence with an erection.

Human intelligence discovered a way of perpetuating itself, one not only more durable and more resistant than architecture, but also simpler and easier.

Scepticism, that dry caries of the intelligence.

Let no one misunderstand our idea; we do not confound what are called 'political opinions' with that grand aspiration after progress with that sublime patriotic, democratic, and human faith, which, in our days, should be the very foundation of all generous intelligence.

In that way imagination and intelligence enter into our existence in the part of servants of the primary instincts