Augustine of Hippo (attributed)

(App. Serm. 72. 1.) Mystically; The mountain is loftiness. But what is higher than the heavens in the world? And Who it was that ascended into heaven, that our faith knows. Why did He ascend alone into heaven? Because no man has ascended into heaven, but He that came down from heaven. For even when He shall come in the end, and shall have exalted us into heaven, He will yet ascend alone, inasmuch as the head with its body is One Christ, and now the head only is ascended. He went up to pray, because He is ascended to make intercession to His Father for us.