C.s. Lewis said this quote
“ destines them to eternity. He therefore, I believe, wants them to attend chiefly to two things, to eternity itself, and to that point of time, which they call the Present. For the Present is the point at which time touches eternity. Of the present moment, and of it only, humans have an experience analogous to the experience which [God] has of reality as a whole; in it alone freedom and actuality are offered them. He would therefore have them continually concerned either with eternity or with the Present--either meditating on their eternal union with, or separation from, Himself, or else obeying the present voice of conscience, bearing the present cross, receiving the present grace, giving thanks for the present pleasure. ”