Gregory the Dialogist

Ver. 6, 7. Though his pride mount up unto the heavens, and his head reach unto the clouds: Yet he shall perish at last like the dunghill. 5. The pride of the hypocrite is said to 'mount up unto the heavens,' when his high-mindedness has the appearance of leading a heavenly life; and his 'head as it were reaches unto the clouds,' when the leading part, i.e. his intellect, is thought to equal the merits of the Saints that have gone before. …

Morals on the Book of Job, Book XV ↗

Thomas Aquinas

It sometimes happens that from that favor which he enjoyed for a short time from his pretense he was lifted up to some high rank, and so as a consequence he shows that this also will not endure for him, saying, "If his pride should ascends up to heaven," that is, if because of this high state which he has attained he ascends to such great pride that he does not think himself liable to fall as the earth, but immovable as the heaven, "and his head touches the clouds," so that it is like he is advanced beyond the common state of man, …

Commentary on Job ↗