There is a Blessedness in Reversion
Blessed are the poor in spirit. Matthew 5:3 Having done with the occasion, I come now to the sermon itself. Blessed are the poor in spirit'. Christ does not begin his Sermon on the Mount as the Law was delivered on the mount, with commands and threatenings, the trumpet sounding, the fire flaming, the earth quaking, and the hearts of the Israelites too for fear; but our Saviour (whose lips dropped as the honeycomb') begins with promises and blessings. So sweet and ravishing was the doctrine of this …
Thomas Watson—The Beatitudes: An Exposition of Matthew 5:1-12

Psalms
The piety of the Old Testament Church is reflected with more clearness and variety in the Psalter than in any other book of the Old Testament. It constitutes the response of the Church to the divine demands of prophecy, and, in a less degree, of law; or, rather, it expresses those emotions and aspirations of the universal heart which lie deeper than any formal demand. It is the speech of the soul face to face with God. Its words are as simple and unaffected as human words can be, for it is the genius …
John Edgar McFadyen—Introduction to the Old Testament