George Haydock's Catholic Commentary
Psalms 9:39
or Hebrew Psalm x. Ver. 18. Earth. St. Jerome is more expressive, "that the man of earth may by no means cherish pride any longer." Though he may be the greatest monarch, he is but man, dust and corruption, ver. 21. (Haydock) --- Christ, who shewed himself wonderful in humility at his birth, (ver. 1.) will display his power at the last day, by giving sentence against the wicked, and by exalting his servants. (Worthington)