 The central thesis in the Yogācāra philosophy, the theory of the two truths echoes is the assertion that all that is conventionally real is only ideas, representations, images, creations of the mind, and that there is no conventionally real object that exists outside the mind to which it corresponds. These ideas are only objects of any cognition. The whole universe is a mental universe. All physical objects are only fiction, they are unreal even by the conventional standard, similar to a dream, a mirage, a magical illusion, where what we perceive are only products of our mind, without a real external existence.