When you come to see a picture of mine, I want you to know that I'm not going to do anything that will make you uncomfortable. I want you to know that you won't be disappointed in me.

The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

The limit of man s knowledge in any subject possesses a high interest which is perhaps increased by its close neighbourhood to the realms of imagination.