The doctrine of Christ’s return affects everything in the Christian life.  It:-

1.  encourages us in daily godliness, 1 Thess 1:10; 2:13; 3:13; 5:23; Tit 2:11-14.
2.  provides a focus for all church life and worship, 1 Cor 1:7; 11:26; Heb 10:25.
3.  gives us confidence in spiritual warfare, Rom 16:20; 1 Cor 6:3; 2 Thess 2:8-12;
Rom 13:11-13; 1 Thess 5:2-8.
4.  comforts us in times of persecution, Rom 8:18-25; 2 Thess 1:6-10.
5.  consoles us at the loss of loved ones, 1 Thess 4:13-18.

See: Peter Lewis, The Glory of Christ, 400