Six at the beginning means:
If a ting is turned upside down before being used, no harm is done-on the contrary, this clears it of refuse. A concubine's position is lowly, but because she has a son she comes to be honored.
These two metaphors express the idea that in a highly developed civilization, such as that indicated by this hexagram, every person of good will can in some way or other succeed. No matter how lowly he may be, provided he is ready to purify himself, he is accepted. He attains a station in which he can prove himself fruitful in accomplishment, and as a result he gains recognition.