One of the reasons we humans love music so much is that it gives us a grip on time. The time that often makes us feel powerless, by flying by relentlessly. We grasp it with music, connect it to tones, to rhythms and to melodies. We give structure to time and arrange it so that we can enjoy it. The basis of music is usually a fundamental rhythm, much like our heartbeat, or, on a grander scale, the coming and going of hours, days and seasons. That rhythm, that variable beat, dictates the tempo and keeps track of time for us. Precisely because life is so fleeting, we naturally like patterns and repetitions, recognizable rhythms and arrangements and unexpected deviations from them. Music influences our heartbeat and triggers emotions in us. We can influence our perception of time with the help of music and shape it to our own pleasure. And, unlike clock time, which is already behind us before we are aware of it, we can experience music over and over again whenever we want.