Today is a moment of light surrounded on all sides by darkness and oblivion. In the entire history of the universe, let alone in your own history, there has never been another just like it and there never will be another just like it again. It is the point to which all your yesterdays have been leading since the hour of your birth. It is the point from which all your tomorrows will proceed until the hour of your death. If you were aware of how precious it is, you could hardly live through it. Unless you are aware of how precious it is, you can hardly be said to be living at all. All other days have either disappeared into darkness and oblivion or not yet emerged from them. Today is the only day there is.

Frederick Buechner