The Millennium in Relation to Sin.
In spite of the fact that Satan will have been removed from the earth, and that Christ reigns in person over it, yet conditions here will not be perfect even in the Millennium. Unregenerate human nature will remain unchanged. Sin will still be present, though much of its outward manifestation will be restrained. Discontent and wickedness will not be eradicated from the hearts of men, but will be kept beneath the surface by means of the Iron Rod. Multitudes will yield to Christ nothing but a "feigned …
Arthur W. Pink—The Redeemer's Return

St. Malachy's Apostolic Labours, Praises and Miracles.
[Sidenote: 1140, October] 42. (23). Malachy embarked in a ship, and after a prosperous voyage landed at his monastery of Bangor,[576] so that his first sons might receive the first benefit.[577] In what state of mind do you suppose they were when they received their father--and such a father--in good health from so long a journey? No wonder if their whole heart gave itself over to joy at his return, when swift rumour soon brought incredible gladness even to the tribes[578] outside round about them. …
H. J. Lawlor—St. Bernard of Clairvaux's Life of St. Malachy of Armagh

Wisdom and Revelation.
"Wherefore I also, after I heard of your faith in the Lord Jesus, and love unto all the saints, cease not to give thanks for you, making mention of you in my prayers; that the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of Him: the eyes of your understanding being enlightened; that ye may know what is the hope of His calling, and what the riches of the glory of His inheritance in the saints, and what is the exceeding greatness …
W. H. Griffith Thomas—The Prayers of St. Paul

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