Letter XI.—For 339. Coss. Constantius Augustus II, Constans I; Præfect, Philagrius the Cappadocian, for the second time; Indict. xii; Easter-day xvii Kal. Mai, xx Pharmuthi; Æra Dioclet. 55.
For constant meditation, and the remembrance of divine words, strengthens piety towards God, and produces a love to Him inseparable and not merely formal; as he, being of this mind, speaks about himself and others like-minded, saying boldly, ‘Who shall separate us from the love of God?’ For such men, being confirmed in the Lord, and possessing an unshaken disposition towards Him, and being one in spirit (for ‘he who is joined to the Spirit is one spirit’), are sure ‘as the mount Sion;’ and although ten thousand trials may rage against them, they are founded upon a rock, which is Christ.
Athanasius, NPNF204, pg 935