“Humor can get in under the door while seriousness is still fumbling at the handle.”

“If you have, let us say, a theory about man, and if you can only prove it by talking about Plato and George Washington, your theory may be a quite frivolous thing. But if you can prove it by talking about the butler or the postman, then it is serious, because it is universal. So far from it being irreverent to use silly metaphors on serious questions, it is one's duty to use silly metaphors on serious questions. It is the test of one's seriousness. It is the test of a responsible religion or theory whether it can take examples from pots and pans and boots and butter-tubs. It is the test of a good philosophy whether you can defend it grotesquely. It is the test of a good religion whether you can joke about it.”

“The difference between the poet and the mathematician is that the poet tries to get his head into the heavens while the mathematician tries to get the heavens into his head.”

“A few people have ventured to imitate Shakespeare's tragedy. But no audacious spirit has dreamed or dared to imitate Shakespeare's comedy. No one has made any real attempt to recover the loves and the laughter of Elizabethan England. The low dark arches, the low strong pillars upon which Shakespeare's temple rests we can all explore and handle. We can all get into his mere tragedy; we can all explore his dungeon and penetrate into his coal-cellar, but we stretch our hands and crane our necks in vain towards that height where the tall turrets of his levity are tossed towards the sky. Perhaps it is right that this should be so; properly understood, comedy is an even grander thing than tragedy.”

“Without education, we are in a horrible and deadly danger of taking educated people seriously.”

“Pride is the downward drag of all things into an easy solemnity. One "settles down" into a sort of selfish seriousness; but one has to rise to a gay self-forgetfulness... Seriousness is not a virtue. It would be a heresy, but a much more sensible heresy, to say that seriousness is a vice. It is really a natural trend or lapse into taking one's self gravely, because it is the easiest thing to do... For solemnity flows out of men naturally; but laughter is a leap. It is easy to be heavy: hard to be light.”

“No one doubts that an ordinary man can get on with this world: but we demand not strength enough to get on with it, but strength enough to get it on. Can he hate it enough to change it, and yet love it enough to think it worth changing? Can he look up at its colossal good without once feeling acquiescence? Can he look up at its colossal evil without once feeling despair? Can he, in short, be at once not only a pessimist and an optimist, but a fanatical pessimist and a fanatical optimist? Is he enough of a pagan to die for the world, and enough of a Christian to die to it? In this combination, I maintain, it is the rational optimist who fails, the irrational optimist who succeeds. He is ready to smash the whole universe for the sake of itself.”