Hexagram 58 is comprised of lake over lake and means joy or the joyous. The Hippopotamus assists clarify this.
Hexagram 24 is comprised of the elements of earth over thunder. It’s basic interpretation is return and it’s associated with the winter solstice. The Snowy Owl symbolizes transition. the lightning represents the thunder element as it’s energy rises rise up from within the earth and is finally manifest, ready to expand.