Everything we do that is not for God is useless. No matter how noble or great our endeavors and intentions might appear, they are all futile. (Ecclesiastes 1:2-3; Psalm 127:1) No task done for any reason besides the glory of God is worth anything. (1 Corinthians 10:31; Colossians 3:17) But for glorifying God, we are useless beings doing useless activities. Except for Christ, there is no reason for any of us to live. (Philippians 1:21; Acts 17:28)
It is only when we do things for the glory of God that they have any value and, by extension, give value to us. The whole point of Heaven is to spend eternity glorifying God. (Revelation 7:9-12; Revelation 5:11-13) If that’s the plan for eternity, shouldn’t it be how we spend our lives in the here and now?