All is always now,” says T. S. Eliot. This statement implies a profound insight: Not only is the now not in time; time is in the now. When the future comes, it will be now, and any past event becomes now as we remember it. There is only one now. It cannot be multiplied; it simply is. The now is the opposite of time. In fact, this is Augustine’s definition: “Eternity is the now that does not pass away.” A happiness anchored in the now is eternal. This precisely is the happiness our heart desires — eternal, and unassailable, because it is beyond the reach of “time the destroyer”

David Steindl-Rast, A Basic Human Approach to Happiness