A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of a human being?

Wisdom lies in understanding our limitations.

Somewhere, something incredible is waiting to be known.

You can't convince a believer of anything; for their belief is not based on evidence, it's based on a deep seated need to believe

I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.

Both the Freudian and the Platonic metaphors emphasize the considerable independence of and tension among the constituent parts of the psyche, a point that characterizes the human condition.

The understanding of the intent of the artist which I can achieve when high sometimes carries over to when I’m down. This is one of many human frontiers which cannabis has helped me traverse.