"Elementary, my dear Watson."

"Life is infinitely stranger than anything which the mind of man could invent."

"A man always finds it hard to realize that he may have finally lost a woman's love, however badly he may have treated her."

"How small we feel with our petty ambitions and strivings in the presence of the great elemental forces of Nature!"

"The world is full of obvious things which nobody by any chance ever observes."