The Tao gives birth to One. One gives birth to yin and yang. Yin and yang give birth to all things... The complete whole is the complete whole. So also is any part the complete whole... But forget about understanding and harmonizing and making all things one. The universe is already a harmonious oneness; just realize it.
Although most people spend their entire lives following this biological impulse (i.e. the sex drive), it is only a tiny portion of our beings. . . . If we remain obsessed with seeds and eggs, we are married to the fertile reproductive valley of the Mysterious Mother but not to her immeasurable heart and all-knowing mind.
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.