In every sports competition or game there is a clock involved. At first the game gets played coasting along through strategies of when to strike and when to play keep away from others. But when the competition is now coming down into the last moments of time, the plays suddenly become the most important as everybody witnesses that the clock is ticking and the clock is now the most important element of the game.
In life why is not every moment most important? People seem to coast along as though there is not a clock at all. But suddenly when there is trouble or when somebody perceives that they are at the end of their time, the clock is most forwarded in the mind and people fall into a realization of how life is "NOW" most important. They fall into a realization where they could have done things differently and they wish they had more time to now set things correct. Some peoples attitudes are toward the thought that the end game could happen at any time so why not just do whatever and when it ends it ends. Why then do people repent at the end of their long lives? Knowing there is a clock that is constantly ticking, align the self to be continuously aware, and the self will get the most out of this life throughout the entirety of its life.