Whenever the Innovator tries to undermine the Tao, Lewis argues, he can’t find an adequate weapon in rationality, instinct, or anything else. There is, finally, nothing “beneath”—that is, more essential than—the Tao that enables him to defend a principle like
Dulce et decorum. Lewis is trying to prove that the Tao is ultimately inescapable; it’s impossible to make sense of anything without embracing it in full.