Human body is reservoir of knowledge in itself but it also connects us to the conscious reservoir of the universe.
If you can just focus on how your hypothalamus ('gross form of so called मनस् तत्व ') orders creation of organic and also inorganic chemicals within you, you'll get access to the world of neurons....the more you hack these the more blissful and full of pleasure you would become.
Stimulant is within you and we all tirelessly struggle to look for it outside.