“Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.” — Albert Einstein
“Whenever you find yourself on the side of the majority, it is time to pause and reflect.” — Mark Twain · Notebook, 1904
“Yesterday is history, tomorrow is a mystery, today is a gift of God, which is why we call it the present.” — Bill Keane · Family Circus, widely attributed
“The cradle rocks above an abyss, and common sense tells us that our existence is but a brief crack of light between two eternities of darkness.” — Vladimir Nabokov · Speak, Memory, 1951