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.
Those who have compassion when they do battle will be victorious. Those who likewise defend themselves will be safe. Heaven will rescue and protect them with compassion.
When superior people hear of the Way, they carry it out with diligence. When middling people hear of the Way, it sometimes seems to be there, sometimes not. When lesser people hear of the Way, they ridicule it greatly. If they didn't laugh at it, it wouldn't be the Way.
To know how little one knows is to have genuine knowledge. Not to know how little one knows is to be deluded. Only those who know when they are deluded can free themselves from such delusion. The intelligent people are not deluded, because they know and accept their ignorance as ignorance, and thereby have genuine knowledge.