Tao Te Ching – Lao Tzu – chapter 35
"All men will come to him who keeps to the one,
For there lie rest and happiness and peace.
Passers by may stop for music and good food,
But a description of the Tao seems without substance or flavor.
It cannot be seen, it cannot be heard,
And yet it cannot be exhausted."
Tao Te Ching - Lao Tzu | 35