Just touching that old tree was truly moving to me because when you touch these trees you have such a sense of the passage of time of history. It's like you're touching the essence the very substance of life.

To those who have chosen the profession of medicine a knowledge of chemistry and of some branches of natural history and indeed of several other departments of science affords useful assistance.

The current state of knowledge is a moment in history changing just as rapidly as the state of knowledge in the past has ever changed and in many instances more rapidly.

Part of what I loved - and love - about being around older people is the tangible sense of history they embody. I'm interested in military history for instance because both my grandfathers fought in World War II. I'm interested in writing because one of those grandfathers wrote books.

Through all of history mankind has ingested psychedelic substances. Those substances exist to put you in touch with spirits beyond yourself with the creator with the creative impulse of the planet.

I am totally fascinated by people and our history as I understand and continue to explore it. People have so much to give and so far to go and yet we have given and gone a great distance. It's really just interesting to ask: why not? And see where that takes me.

The history of progress is written in the blood of men and women who have dared to espouse an unpopular cause as for instance the black man's right to his body or woman's right to her soul.

The history of liberty is a history of resistance.

I am what time circumstance history have made of me certainly but I am also much more than that. So are we all.

There are no extraordinary men... just extraordinary circumstances that ordinary men are forced to deal with.