Charles H. Spurgeon on Psalms 123:2

Servants. Note how humbly the faithful think of themselves in the sight of God. They are called and chosen to this dignity, to be the heirs and children of God, and are exalted above the angels, and yet, notwithstanding, they count themselves no better in God's sight than "servants." They say not here, Behold, like as children look to the hand of their fathers, but "as servants" to the hand of their masters. This is the humility and modesty of the godly, and it is so far off that hereby they lose the dignity of God's children, to the which they are called, that by this means it is made to them more sure and certain. —Martin Luther.