Certainly we do not need quantum mechanics for macroscopic objects, which are well described by classical physics - this is the reason why quantum mechanics seems so foreign to our everyday existence.
.. But do you understand, I cry to him, do you understand that along with happiness, in the exact same way, in perfectly equal proportion, man also needs unhappiness
We love kitties, gawd bless their little whiskers, and we don't give a damn whether they or we are superior or inferior! They're confounded pretty, and that's all we know and all we need to know!
No authority can save us, no beliefs. If there is a God, all can find Him. No one needs to be told it is warm; all can discover it for themselves. So it should be with God. He should be a fact in the consciousness of every person.
A loaf of bread, the Walrus said, Is what we chiefly need: Pepper and vinegar besides Are very good indeed-- Now if you're ready, Oysters, dear, We can begin to feed!