Gregory the Great — as excerpted in the Catena Aurea on John 14:15-17

“(v. Mor.) The Holy Spirit kindles in every one, in whom He dwells, the desire of things invisible. And since worldly minds love only things visible, this world receiveth Him not, because it rises not to the love of things invisible. In proportion as secular minds enlarge themselves by the spread of their desires, in that proportion they narrow themselves, with respect to admitting Christ.”