I can remember the night that I suddenly realized what it was like to be crazy, or nights when my feelings and perceptions were of a religious nature. I had a very accurate sense that these feelings and perceptions, written down casually, would not stand the usual critical scrutiny that is my stock in trade as a scientist. If I find in the morning a message from myself the night before informing me that there is a world around us which we barely sense, or that we can become one with the universe, or even that certain politicians are desperately frightened men, I may tend to disbelieve; but when I'm high I know about this disbelief. And so I have a tape in which I exhort myself to take such remarks seriously. I say, "Listen closely, you sonofabitch of the morning! This stuff is real!" I try to show that my mind is working clearly; I recall the name of a high school acquaintance I have not thought of in 30 years; I describe the color, typography, and format of a book in another room and these memories do pass critical scrutiny in the morning. I am convinced that there are genuine and valid levels of perception available with cannabis (and probably with other drugs) which are, through the defects of our society and our educational system, unavailable to us without such drugs. Such a remark applies not only to self-awareness and to intellectual pursuits, but also to perceptions of real people, a vastly enhanced sensitivity to facial expression, intonations and choice of words which sometimes yields a rapport so close it's as if two people are reading each others' minds.
Cannabis enables non-musicians to know a little about what it is like to be a musician, and non-artists to grasp the joys of art. But I am neither an artist nor a musician. What about my own scientific work? While I find a curious disinclination to think of my professional concerns when high - the attractive intellectual adventures always seem to be in every other area - I have made a conscious effort to think of a few particularly difficult current problems in my field when high. It works, at least to a degree. I find I can bring to bear, for example, a range of relevant experimental facts which appear to be mutually inconsistent. So far, so good. At least the recall works. Then in trying to conceive of a way of reconciling the disparate facts, I was able to come up with a very bizarre possibility, one that I'm sure I would never have thought of down. I've written a paper which mentions this idea in passing. I think it's very unlikely to be true, but it has consequences which are experimentally testable, which is the hallmark of an acceptable theory.
I have mentioned that in the cannabis experience there is a part of your mind that remains a dispassionate observer, who is able to take you down in a hurry if need be. I have on a few occasions been forced to drive in heavy traffic when high. I've negotiated it with no difficulty at all, though I did have some thoughts about the marvelous cherry-red color of traffic lights. I find that after the drive I'm not high at all. There are no flashes on the insides of my eyelids. If you're high and your child is calling, you can respond about as capably as you usually do. I don't advocate driving when high on cannabis, but I can tell you from personal experience that it certainly can be done. My high is always reflective, peaceable, intellectually exciting, and sociable, unlike most alcohol highs, and there is never a hangover. Through the years I find that slightly smaller amounts of cannabis suffice to produce the same degree of high, and in one movie theater recently I found I could get high just by inhaling the cannabis smoke which permeated the theater.
There is a very nice self-titrating aspect to cannabis. Each puff is a very small dose; the time lag between inhaling a puff and sensing its effect is small; and there is no desire for more after the high is there. I think the ratio, R, of the time to sense the dose taken to the time required to take an excessive dose is an important quantity. R is very large for LSD (which I've never taken) and reasonably short for cannabis. Small values of R should be one measure of the safety of psychedelic drugs. When cannabis is legalized, I hope to see this ratio as one of he parameters printed on the pack. I hope that time isn't too distant; the illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.