What is time? We mark its passage with calendars, clocks, and watches yet we cannot hold it in our hands. It does not make a sound but grandfather clocks and church bells sound out its passage. It is invisible to the eye but the lilies of the field radiate God's glory spring after spring. To the young it is limitless, but to the wise it is not a renewable resource. Therefore, how we spend our days on earth is of great importance. In contrast, God exists outside of time and views our lives from an eternal perspective. Is it possible to develop that perspective, too? From the feasts of Israel to the New Jerusalem, this study explores time, aging, and eternity from a Biblical point of view. It also examines what will happen when time finally comes to an end.