A little reflection will show us that every belief, even the simplest and most fundamental, goes beyond experience when regarded as a guide to our actions.

An atom must be at least as complex as a grand piano.

To know all about anything is to know how to deal with it under all circumstances.

Our lives our guided by that general conception of the course of things which has been created by society for social purposes.

If a man, holding a belief which he was taught in childhood or persuaded of afterwards, keeps down and pushes away any doubts which arise about it in his mind, purposely avoids the reading of books and the company of men that call in question or discuss it, and regards as impious those questions which cannot easily be asked without disturbing it - the life of that man is one long sin against mankind.

He who truly believes that which prompts him to an action has looked upon the action to lust after it, he has committed it already in his heart.

We feel much happier and more secure when we think we know precisely what to do, no matter what happens, then when we have lost our way and do not know where to turn.