What are the motifs in Tao Te Ching by Stephen Mitchell?

The Tao Te Ching warns that looking, listening, and reaching wisdom are impossible, but one can be wisdom. Author Lao-tzu admits that some people find his teaching nonsense, lofty but impractical, but those who look inside themselves see that it makes perfect sense. Lao-tzu teaches simplicity, patience, and compassion. Lao-tzu's teachings are easy to understand but hard to practice.