Thomas Aquinas

It would seem that Christ should not have been born in Bethlehem. For it is written: "The law shall come forth from Sion, and the Word of the Lord from Jerusalem." But Christ is truly the Word of God. Therefore He should have come into the world at Jerusalem. But, as David was born in Bethlehem, so
also did he choose Jerusalem to set up his throne there, and to build there the Temple of God, so that Jerusalem was at the same time a royal and a priestly city. Now, Christ's priesthood and kingdom were "consummated" principally in His Passion. Therefore it was becoming that He should choose Bethlehem for His Birthplace and Jerusalem for the scene of His Passion.

When Christ was born, when the whole world lived under one ruler, peace abounded on the earth. Therefore it was a fitting time for the birth of Christ, for "He is our peace, who hath made both one," as it is written (Eph. 2:14). Wherefore Jerome says on Is. 2:4: "If we search the page of ancient history, we shall find that throughout the whole world there was discord until the twenty-eighth year of Augustus Caesar: but when our Lord was born, all war ceased"; according to Is. 2:4: "Nation shall not lift up sword against nation."

It is said that in Christ there was the fear of God, not indeed as it regards the evil of separation from God by fault, nor as it regards the evil of punishment for fault; but inasmuch as it regards the Divine pre-eminence, on account of which the soul of Christ, led by the Holy Spirit, was borne towards God in an act of reverence. Hence it is said (Heb. 5:7) that in all things "he was heard for his reverence." For Christ as man had this act of reverence towards God in a fuller sense and beyond all others. And hence Scripture attributes to Him the fulness of the fear of the Lord. not judge according to sight: To judge belongs to God in virtue of His own power: wherefore His judgment is based on the truth which He Himself knows, and not on knowledge imparted by others: the same is to be said of Christ, Who is true God and true man: whereas other judges do not judge in virtue of their own power, so that there is no comparison.

The most inveterate pagans, being once converted, entirely alter their manners, Osee ii. 18. (George Haydock) earth is filled with the knowledge: Thus we see that since the Incarnation of Christ men have been instructed more evidently and surely in the knowledge of God.

God does not bestow on some the help for avoiding sin which He bestows on others. This help is not merely the infusion of grace, but also an exterior guardianship, whereby the occasions of sin are providentially removed from a man’s path. God also aids man against sin by the natural light of reason, and other natural goods that He bestows on man. When then He withdraws these aids from some, as their conduct deserves that he should, according to the exigency of His justice, He is said to harden them, or to blind them. (St. Thomas Aquinas On God and His Creaure 3.163.4)