Upper trigram
☶
Mountain · Gen
Stillness and limit.
FamilyYoungest son
ElementEarth
Hexagram 22 of 64
☶☲ Grace
Form and beauty, but on a small scale.
Lower trigram
☲
Fire · Li
Clarity and attachment.
FamilyMiddle daughter
ElementFire
The image
Mountain above, Fire below.
Mountain over Fire: stillness and limit meeting clarity and attachment.
That combination is the whole meaning of hexagram 22. Nothing about it is arbitrary — change either trigram and you get a different hexagram with a different reading, which is why the 64 form a system rather than a list.