Heart of the person ticks approximately 75 blows in a minute. It is less than for a second in our organism something varies. Our own Universe develops at reckless speed. It is evolution. Sensations are momentary. Every instant it is filled by something especial. Now it is — tomorrow it is forgotten. That has ended, that not to return any more. And whether costs? After all in a second something will be new another. So there is today all: culture, design, music. Melodies bother, ideas grow old, records are updated, tendencies become a fashion, and a fashion — history. By the way, the text too is forgotten instantly or becomes classics. You remember, with what it began? I — was not present. Therefore we here — about momentary. And, of course, on the contrary — about ideas which in a year can become without exception fashionable. And about people who run ahead of a steam locomotive and disperse a wheel of evolution to a velocity of light.