In the final part of this prayer, Paul prays that their hearts will be strong, innocent, and holy. Here, the word hearts means their behavior and moral strength (3:11–13; Matthew 5:8; Acts 15:9; Hebrews 10:22).
When Jesus comes, he will be with all his holy people. This may mean angels (Deuteronomy 33:2; Psalm 89:5, 7; Daniel 4:13; 8:13; Matthew 13:41; Mark 8:38; 13:26–27; 2 Thessalonians 1:7).