I may have merged several points or used another translation for the Climacus point about the exaltation of humility. Here are more exact quotations from the searchable translation by Fr. Lazarus Moore.

"A meek soul is a throne of simplicity, but an angry mind is a creator of evil." Ladder, St. John, Step 24.9

"Man ought to use every means to raise his clay, so to speak, and seat it on the throne of God. And let no one make excuses for not undertaking this ascent, because the way and the door are open." Ladder, St. John, Step 26.135