Aldous Huxley said this quote
“ One entered the world, Denis pursued, having ready-made ideas about everything. One had a philosophy and tried to make life fit into it. One should have lived first and then made one's philosophy to fit life...Life, facts, things were horribly complicated; ideas, even the most difficult of them, deceptively simple. In the world of ideas, everything was clear; in life all was obscure, embroiled. Was it surprising that one was miserable, horribly unhappy? ”