Time is a measure of energy, a measure of motion. And we have agreed internationally on the speed of the clock. And I want you to think about clocks and watches for a moment. We are of course slaves to them. And you will notice that your watch is a circle, and that it is calibrated, and that each minute, or second, is marked by a hairline which is made as narrow as possible, as yet to be consistent with being visible. And when we think of a moment of time, when we think what we mean by the word ‘now’; we think of the shortest possible instant that is here and gone, because that corresponds with the hairline on the watch. And as a result of this fabulous idea, we are a people who feel that we don’t have any present, because the present is instantly vanishing – it goes so quickly. It is always becoming past. And we have the sensation, therefore, of our lives as something that is constantly flowing away from us. We are constantly losing time. And so we have a sense of urgency. Time is not to be wasted. Time is money. And so, because of the tyranny of this thing, we feel that we have a past, and we know who we are in terms of our past. Nobody can ever tell you who you are, they can only tell you who they were. And we think we also have a future. And that is terribly important, because we have a naive hope that the future is somehow going to supply what we are looking for. You see, if you live in a present that is so short that it is not really here at all, you will always feel vaguely frustrated.