"The final form of the (Mahayana) Buddhist doctrine of incarnation is the idea of trikaya, three bodies: first, “Transformation Body,” the earthly Buddha, a transient and illusionary form of existence; second, “Enjoyment Body,” the form of existence for the sake of others; and third, “Dhamma Body,” the ultimate form of existence that indeed is no longer a “form” of existence but formless."
January 1, 1970
https://en.wikiquote.org/wiki/Incarnation