While both Tiantai and Huayan hold to the interpenetration and interconnection of all things, their metaphysics have some differences. Huayan metaphysics is influenced by Yogacara thought and is closer to idealism. The Avatamsaka sutra compares the phenomenal world to a dream, an illusion, and a magician's conjuring. The sutra states nothing has true reality, location, beginning and end, or substantial nature. The Avatamsaka also states that "The triple world is illusory – it is only made by one mind", and Fazang echoes this by writing, "outside of mind there is not a single thing that can be apprehended." Furthermore, according to Huayan thought, each mind creates its own world "according to their mental patterns", and "these worlds are infinite in kind" and constantly arising and passing away. However, in Huayan, mind is not real either, but also empty. The true reality in Huayan, the noumenon, or "Principle", is likened to a mirror, while phenomena are compared to reflections in the mirror. It is also compared to the ocean, and phenomena to waves.