Chapter four focuses on the Western Apache conception of wisdom and it explains the title of the book. Wisdom, for the Apache, is not a set of known propositions about, say, ultimate matters. Instead, wisdom is a virtue of the mind. Specifically the Apache's describe being wise as having a "smooth" mind that is both "steady" and "resilient". Smooth minds think clearly with ease. Mental resilience bars external distractions and mental steadiness blocks internal distractions. A mind that is both steady and resilient is smooth and can walk the path of life effectively.