Don't imagine that you'll discover {the truth} by accumulating more knowledge. Knowledge creates doubt, and doubt makes you ravenous for more knowledge. You can't get full eating this way.
Empty your mind of all thoughts. Let your heart be at peace. Watch the turmoil of beings, but contemplate their return. Each separate being in the universe returns to the common source. Returning to the source is serenity. If you don't realize the source, you stumble in confusion and sorrow. When you realize where you come from, you naturally become tolerant, disinterested, amused, kindhearted as a grandmother, dignified as a king. Immersed in the wonder of the Tao, you can deal with whatever life brings you, and when death comes, you are ready.
The seed of mystery lies in muddy water. How can I perceive this mystery? Water becomes clear through stillness. How can I become still? By flowing with the stream.
A good traveler has no fixed plans and is not intent upon arriving. A good artist lets his intuition lead him wherever it wants. A good scientist has freed himself of concepts and keeps his mind open to what is. Thus the Master is available to all people and doesn't reject anyone. He is ready to use all situations and doesn't waste anything. This is called embodying the light. What is a good man but a bad man's teacher? What is a bad man but a good man's job? If you don't understand this, you will get lost, however intelligent you are. It is the great secret.