Not only is the limitless nature of God’s mercies asserted, but also the constant conservation thereof. They are constantly renewed. While God’s covenantal love does not fail (see Psalm 86:15; Psalm 89:34; Psalm 103:8; Isaiah 54:10; Exodus 34:6; Numbers 14:18; Nehemiah 9:17), and while there is also no end to his mercy (says Zechariah 1:16), it is also as steady and inexhaustible as the natural order (see Jeremiah 33:25). It is confirmed and solid as a rock and yet, every morning it is new (see also Psalm 119:90; Psalm 146:6).1
The writer therefore elaborates on the endlessness of God's covenantal love and mercies by recalling how they are new every morning. In rising again after a refreshing sleep and contemplating God's sunlight every morning anew and afresh, the writer sees the constant manifestations of God's love and mercies.2 The word new
does not mean that they did not exist before; it depicts a new experience of what was given before. Each new day, God’s covenant love and mercies flow from his compassionate nature. For his people who were severely punished, every new day brings the possibility of restoration by God.
From this expression, the writer develops a further exclamation by praising God directly: Great is your faithfulness.
3 That faithfulness is related to God's truth; God is not fickle and changeable. His faithfulness lies in the fact that he judges righteously and faithfully, but also shows his mercies faithfully to his covenant people.
In this development it is also noticeable how the writer's courage of faith increases, as the admiring and adoring recognition of God's faithfulness wells up from his soul. In the next verse his mood of despair has completely disappeared to make way for that joyful expression of faith: without hesitation he testifies to his personal assurance of communion with God.4
23 Elles se renouvellent chaque matin. Oh! que ta fidélité est grande!