Those who vainly reason without understanding the truth are lost in the jungle of the Vijnanas (the various forms of relative knowledge), running about here and there and trying to justify their view of ego-substance. The self realized in your inmost consciousness appears in its purity; this is the Tathagata-garbha (literally, Buddha-womb), which is not the realm of those given over to mere reasoning. Pure in its own nature and free from the category of finite and infinite, Universal Mind is the undefiled Buddha-womb, which is wrongly apprehended by sentient beings.

Lankavatara Sutra