Intellect is the only instrument that can take us away from two unreal worlds to real authority. As we gain an understanding of reality through knowledge, we start introspection of it. This makes our conviction stronger about the real authority, our Intellect could easily discriminate and bring mind and senses under its control.
Then, intellect only plays an important role in establishing ourselves in existence, consciousness, bliss state ( sat chit aanand).
InnerRealisation 