St. Macarius the Great ca. 4th cent.
…[T]he heart itself is but a small vessel, yet there also are dragons and there are lions; there are poisonous beasts and all the treasures of evil. And there are rough and uneven roads; there are precipices. But there also is God, also the angels, the life and the kingdom, the light and Apostles, the treasures of grace — there are all things. (The Fifty Spiritual Homilies, Homily 43.7)
