In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

The world is full of magical things patiently waiting for our wits to grow sharper.

—Bertrand Russell

Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones.

—Bertrand Russell

In the part of this universe that we know there is great injustice, and often the good suffer, and often the wicked prosper, and one hardly knows which of those is the more annoying.

—Bertrand Russell

Science may set limits to knowledge, but should not set limits to imagination.

—Bertrand Russell

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

—Bertrand Russell

Doubt is the father of invention.

—Ambrose Bierce

If a man loves you, you'll never question where his heart is. He will never place doubt in your mind. You'll actually feel the love he has for you, not because he has told you, but because his actions show and prove it every single day.

—Leslie Braswell in Get the Guy

Sometimes you think you know things, know things very deeply, only to realize you don't know a damn thing.

—Jandy Nelson in I'll Give You the Sun

You can never underestimate the stupidity of the general public.

—Scott Adams

When we are in love we often doubt that which we most believe.

—Francois de La Rochefoucauld