Presentation of truth through signs has great power to feed and fan that ardent love by which, as under some law of gravitation, we flicker upward, or inward, to our place of rest.
The emotions are less easily set alight while the soul is wholly absorbed in material things. But when it is brought to material signs of spiritual realities, and moves from them to the things they represent, it gathers strength just by this very act of passing from the one to the other.
-- Letter 55, 11
Prayer. Lord, my knowledge and my ignorance lie before you. Where you have opened to me, let me enter. Where you have closed to me, open when I knock.
-- The Trinity 15, 51