The trigram Qian is in command of bestowal; the trigram Kun is command of receiving nourishment. Change refers to the change and transformation of Yin and Yang. As Yin and Yang act upon each other they create the six trigrams Fire ☲, Water ☵, Thunder ☳, Lake ☱, Mountain ☶ and Wind ☴. Heaven and Earth are Father and Mother, the other six trigrams are Sons and Daughters.
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