William Kelly Major Works Commentary
A Song of degrees. Behold, bless ye the LORD, all ye servants of the LORD, which by night stand in the house of the LORD."A song of the ascents." It is no longer Sinai, the mountain of the people's responsibility, but Zion, the seat of royal grace, after the fleshly king's ruin also. Under the true King and the faithful Priest praise unceasing rises, even in the nights. How should it be otherwise when Christ establishes the blessing on the overthrow of the enemy?
Now follow a few psalms less closely connected, though the second may be regarded as an answer to the first. The third stands comparatively isolated, yet in its evidently right place. The fourth, instead of (like it) recalling the shame and sorrow of the Babylonish captivity, is an avowed thanksgiving to Jehovah, not only for His word, but for His everlasting loving-kindness. These are all judicial, and apply during the crisis which marks the incoming of the new age, The fifth or last expresses the deeper work of self-judgment before the inescapable presence of Jehovah; yet it looks the more for His slaying the wicked (the judgment of the quick and of the dead), while baring the heart now in order to be thoroughly proved and led in the way everlasting. The last two are Davidical, as are the seven that succeed.
Lift up your hands in the sanctuary, and bless the LORD.
The LORD that made heaven and earth bless thee out of Zion.