To every separate person a thing is what he thinks it is – in other words, not a thing, but a think.

It's very good for an idea to be commonplace. The important thing is that a new idea should develop out of what is already there so that it soon becomes an old acquaintance. Old acquaintances aren't by any means always welcome, but at least one can't be mistaken as to who or what they are.

A good book is the precious life-blood of a master-spirit, embalmed and treasured up on purpose to a life beyond life, and as such it must surely be a necessary commodity.

Duty is what no-one else will do at the moment.

Morality is seldom a safe guide for human conduct.

On the whole, I think you should write biographies of those you admire and respect, and novels about human beings who you think are sadly mistaken.

The body, then, has a mind of its own. It must follow, then, that the Mind has a body of its own, even if it’s like nothing that we can see around us, or have ever seen.