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

Every mind must make its choice between truth and repose. It cannot have both.

God offers to every mind a choice between repose and truth. take which you please--you can never have both. [Essay on Intellect]

It came into him life, it went out from him truth. It came to him short-lived actions; it went from him poetry. It was a dead fact; now, it is quick thought. It can stand, and it can go. It now endures, it now flies, it now inspires. Precisely in porportion to the depth of mind from which it issued, so high does it soar, so long does it live.

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

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