At still higher doses psilocybin triggers this activity in the language-forming capacity of the brain that manifests as song and vision. Psilocybin may have synergized the emergence of higher forms of psychic organization out of primitive protohuman animals. It can be seen as a kind of evolutionary enzyme, or evolutionary catalyst.
—   Terence  McKenna

Psychedelics are illegal not because a loving government is concerned that you may jump out of a third story window.

Psychedelics are illegal because they dissolve opinion structures and culturally laid down models of behaviour and information processing. They open you up to the possibility that everything you know is wrong.

—  Terence Mckenna

“The shamanic faith is that humanity is not without allies. There are forces friendly to our struggle to birth ourselves as an intelligent species. But they are quiet and shy; they are to be sought, not in the arrival of alien star fleets in the skies of earth, but nearby, in wilderness solitude, in the ambiance of waterfalls, and yes, in the grasslands and pastures now too rarely beneath our feet.”

- Terence McKenna
Food of the Gods: The Search for the Original Tree of Knowledge A Radical History of Plants, Drugs, and Human Evolution

Image Credit: stroggtank @ DeviantArt

We have the money, the power, the medical understanding, the scientific know-how, the love and the community to produce a kind of human paradise. But we are led by the least among us — the least intelligent, the least noble, the least visionary. We are led by the least among us and we do not fight back against the dehumanizing values that are handed down as control icons.
—  Terence Mckenna