Nature is the incarnation of thought. The world is the mind precipitated.

To the dull mind nature is leaden. To the illumined mind the whole world burns and sparkles with light.

Every revolution was first a thought in one man's mind

Nature never wears a mean appearance. When we speak of nature in this manner, we have a distinct but most poetical sense of mind.

For if in any manner we can stimulate this instinct, new passages are opened for us into nature, the mind flows into and through things hardest and highest, and the metamorphosis is possible

God offers to every mind its choice between truth and repose. Take which you please - you can never have both.