C.H. Spurgeon comments on Psalm 89:1
I will sing of the steadfast love of the Lord, forever;
with my mouth I will make known your faithfulness to all generations.
Note, that in this second sentence he speaks of faithfulness, which is the mercy of God’s mercies—the brightest jewel in the crown of goodness. The grace of an unfaithful God would be a poor subject for music, but unchangeable love and immutable promises demand everlasting songs. In times of trouble it is the divine faithfulness which the soul hangs upon; this is the bower anchor of the soul, its hold fast, and its stay. Because God is, and ever will be, faithful, we have a theme for song which will not be out of date for future generations; it will never be worn out, never be disproved, never be unnecessary, never be an idle subject, valueless to mankind. It will also be always desirable to make it known, for men are too apt to forget it, or to doubt it, when hard times press upon them.
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