Thy righteousness - is very high - מרום עד ad marom - is up to the exalted place, reaches up to heaven. The mercy of God fills all space and place. It crowns in the heavens what it governed upon earth.
Who hast done great things - גדלות gedoloth . Thou hast worked miracles, and displayed the greatest acts of power.
Who is like unto thee! - כמוך מי mi camocha . God is alone, - who can resemble him? He is eternal. He can have none before, and there can be none after; for in the infinite unity of his trinity he is that eternal, unlimited, impartible, incomprehensible, and uncompounded ineffable Being, whose essence is hidden from all created intelligences, and whose counsels cannot be fathomed by any creature that even his own hand can form. Who is Like Unto Thee! will excite the wonder, amazement, praise, and adoration of angels and men to all eternity.
Thy righteousness also, O God, is very high - See the notes at Psalm 36:5. The purpose of the psalmist is to exalt that righteousness as much as possible, and he, therefore, compares it with that which is high - the heavens - the highest thing of all. The literal rendering would be, “even to the high,” or the height; that is, to the highest place. The passage is designed to express his confidence in God, in the infirmities and troubles which he must expect to come upon him with advancing years.
Who hast done great things - In his work of creation; in his providence; in his manifested mercy toward his people. He had done things so great as to show that he could protect those who put their trust in him.