The three bodies of Buddha: truth, enjoyment, and emanation.
The Trikaya describes the Buddha as three bodies nested within one another: the Dharmakaya, the formless absolute truth itself; the Sambhogakaya, a radiant visionary body of bliss; and the Nirmanakaya, the physical Buddha who walked the earth. One awakened nature, expressed on three levels at once.
Trikaya unlocks a layered model of reality reaching from the ungraspable absolute down to tangible manifestation — a structure of essence and expression, where the deepest truth is formless yet appears as form so it can be met. It is a template for anything that exists at once as principle, image, and instance.