The highest gods come to Buddha for instruction.
They must become human in order to be able to be redeemed.
They are humans who lead a god-like life for uncountable aeons.
Then their karma is ended, and they must be born again like any other mortal. It is said that Buddhism is a religion without gods.
In truth, however, that’s not the case.
The highest god is the god reborn in man, Buddha himself. ~Carl Jung, Psychology of Yoga and Meditation, Page 47
This circle of the Bodhis is the so-called round terrace of enlightenment.
This circle is the ground upon which the Bodhi tree stands, that tree under which Buddha fought off the attack of Mâra, the devil.
By not being present, he did not allow himself to get lost in existence, but was non-existing.
For this reason, the seat of the Buddha is empty.
And the devil also tries in vain to attack this seat.
There are pictorial representations of this situation in Indian art.
You see Mâra under the tree where the empty lotus seat of the Buddha stands. ~Carl Jung, Psychology of Yoga and Meditation, Page 48