„Never Do Yesterday What Should Be Done Tomorrow.“

— Robert A. Heinlein
„The life of this world is made up of three days: yesterday has gone with all that was done; tomorrow, you may never reach; but today is for you so do what you should do today.“
— Hasan al-Basri
„Yesterday's just a memory; tomorrow's never what it's supposed to be.“
— Bob Dylan
„It's all now you see: tomorrow began yesterday and yesterday won't be over until tomorrow.“
— William Faulkner
„Yesterday's weirdness is tomorrow's reason why.“
— Hunter S. Thompson