This is the first of six psalms which constitute the Hallel or Hymn of Praise, which the Hebrews sang at Passover, Pentecost, and the Feast of Tabernacles. This group is necessarily of special interest to us because in all probability, these psalms were sung by our Lord and His disciples on that dark night in which He was betrayed.
The first psalm celebrates the name of The LORD on two accounts. He is high, yet He is lowly. Yet how He humbles Himself! Think of these words passing the lips of Him Who "humbled Himself," and became "obedient unto death." Then notice the evidences of God’s humility and height. He stoops to lift, for He raiseth the poor, lifteth up the needy, and turns barreness into the joy of motherhood.