THE SIGN:

Trigram Ch'ien, the Creativeabove Ch'ien the Creative, Heaven
Trigram Kên, Keeping Stillbelow Kên Keeping Still, Mountain

The power of the dark is ascending. The light retreats to security, so that the dark cannot encroach upon it. This retreat is a matter not of man's will but of natural law. Therefore in this case withdrawal is proper; it is the correct way to behave in order not to exhaust one's forces.
In the calendar this hexagram is linked with the sixth month (July-August), in which the forces of winter are already showing their influence.