Niels Bohr, one of the founders of quantum mechanics, faced a problem: Light behaves like a wave in some experiments and like a particle in others. These descriptions seem contradictory. So which is light really? His answer, the principle of complementarity, was radical: Light is both. Wave and particle aren't contradictor, but they're complementary descriptions that are both necessary and both valid. I think this framework is what we need for thinking about science and spiri