I am sitting with a philosopher in the garden; he says again and again 'I know that thatโs a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isnโt insane. We are only doing philosophy.
Ludwig WittgensteinWe could present spatially an atomic fact which contradicted the laws of physics, but not one which contradicted the laws of geometry.
Ludwig WittgensteinYou can't hear God speak to someone else, you can hear him only when you are being addressed.
Ludwig WittgensteinMathematics is a logical method. . . . Mathematical propositions express no thoughts. In life it is never a mathematical proposition which we need, but we use mathematical propositions only in order to infer from propositions which do not belong to mathematics to others which equally do not belong to mathematics.
Ludwig Wittgenstein