There is one thing we all have been given that is the same is life. We all have been given our lives to use for the glory of God. We don't know how long the time span will last. We know the date of our birth, but we usually don't know the date of our death. However, we have a lot to do with that time in between, how we invest it, and how we use it for the glory of God.
We make a big mistake when we think we will live long lives, because no one has that assurance. As Moses prayed, "So teach us to number our days, that we may gain a heart of wisdom" (Psalm 90:12). Indeed, the Bible says there is "a time to be born, and a time to die" (Ecclesiastes 3:2). We don't know when that time will come for us, so we want to live our lives wisely in the interim.
So how should we be living? For what purpose are we put on this earth? Why are we here? According to Scripture, we are here to glorify God. We exist to bring glory to the One who made us. In fact, one of the songs we will be singing in Heaven is, "You are worthy, O Lord, to receive glory and honor and power; for You created all things, and by Your will they exist and were created" (Revelation 4:11). We exist for the pleasure of God. We exist to bring glory to Him.
The Bible tells us that we are to redeem the time because the days are evil (see Ephesians 5:16). As one translation puts it, we are to make sacred and wise use of every opportunity. God has given us this special gift called life. So let's use it wisely.