The tao that can be told is not the eternal Tao.
The Name that can be named is not the eternal Name.
The unnamable is the eternally real.
Naming is the origin of all particular things.
Free from desire, you realize the mystery.
Caught in desire, you see only the manifestations.
Yet mystery and manifestations arise from the same source.
This source is called darkness.
Darkness within darkness.
The gateway to all understanding.
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Lao Tzu opens up the Tao Te Ching with claiming that the way that can be told, is not the eternal way.
This is the theme of the entirety of part one. Ignorance leads to truth, yet not blind ignorance, admittance of it and acceptance of the truth as it is revealed. Often we make the mistake of trying to take the truth as we see fit, this is a mistake. The proper form of learning, is to remain in the spectator state, and allowing truth to reveal itself in accordance with it self.