Thou lovest righteousness, and hatest wickedness: therefore God, thy God, hath anointed thee with the oil of gladness above thy fellows. Oil of gladness - As an evidence that all causes of mourning, sorrow, and death, were at an end; as in the state of mourning the ancients did not anoint themselves.
I have mentioned above that the author of the Epistle to the Hebrews, Hebrews 1:8, Hebrews 1:9, quotes Psalms 45:6, Psalms 45:7, of this Psalm. I shall subjoin the substance of what I have written on these verses in that place: -