Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.

We are always getting ready to live but never living.

Who shall forbid a wise skepticism, seeing that there is no practical question on which anything more than an approximate solution can be had?

Respect the child. Be not too much his parent. Trespass not on his solitude.

Our spontaneous action is always the best. You cannot, with your best deliberation and heed, come so close to any question as your spontaneous glance shall bring you.

Old & New put their stamp to everything in Nature. The snowflake that is now falling is marked by both. The present moment gives the motion & the color of the flake: Antiquity, its form & properties. All things wear a luster which is the gift of the present & a tarnish of time.

Nature will not be Buddhist: she resents generalizing, and insults the philosopher in every moment with a million fresh particulars.