Thy Kingdom come brings to mind truths that help us rest and relax from anxiety. We recall the Beatitudes and Christ's promises, and think about the world to come where there are no more tears... And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away. (Rev 21:4)
God has so arranged our experience of life that we can enjoy a foretaste of his kingdom now. We read of that pleasure in the parable of the Pearl of Great Price. Again, the kingdom of heaven is like unto a merchant man, seeking goodly pearls: Who, when he had found one pearl of great price, went and sold all that he had, and bought it. (Mat 13:45-46) This, figuratively, is what each of Christ’s disciples had done, and must do.
Yet at times we, as they, might wonder if we chose wisely. Even Christ’s forerunner, John the Baptist, asked through his own disciples: Art thou he that should come, or do we look for another? Jesus answered, Go and shew John again those things which ye do hear and see: The blind receive their sight, and the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, and the poor have the gospel preached to them. (Mat 11:3-5)
We do not always see the mighty works of God in our walk with the LORD, but we can know we do live in his kingdom now: Blessed are the poor in spirit, for theirs is the kingdom of heaven… and Blessed are they which are persecuted for righteousness' sake, for theirs is the kingdom of heaven. (Mat 5:3, 10)