Those who have been considered worthy to go forth as the sons of God and to be born again of the Holy Spirit from on high, and who hold within them the Christ who renews them and fills them with light, are directed by the Spirit in varied and different ways and in their spiritual repose they are led invisibly in their hearts by grace. At times, they are like men who mourn and lament over their fellow men, and pouring forth prayers for the whole human race, they plunge into tears and lamentation, on fire with spiritual love for mankind. At other times they are enkindled by the Spirit with love and exultation that, were it possible, they would clasp in their embrace all mankind, without discrimination, good and bad alike. Sometimes they are cast down below all mankind in lowliness of spirit, so that they reckon theirs to be the lowest and most abject of conditions. And sometimes they are held by the Spirit in ineffable joy.
From a homily by a spiritual writer of the fourth century