Julianus Pomerius (wrote around the end of the 5th century):
"Let the pursuer of the contemplative life, then, approach his Creator to be enlightened in heart; let him watchfully serve Him by contemplating Him and untiringly enjoying Him; let him desire Him continually; for love of Him let him flee all that could turn Him away; let him rest all his thoughts and all his hope on his pleasure. Let him take time for holy meditations on the Sacred Scriptures; let him, being divinely illumined, delight in them. There let him consider his whole being as in some gleaming mirror; let him correct what he sees disordered; let him hold to what is right; reform what is deformed; cultivate what is beautiful; preserve what is sound; by careful reading strengthen what is weak. Let him not tire of reading the commandments of his Lord, love them without growing weary, fulfill them efficaciously; and, being adequately instructed by them, let him understand what he should avoid and what he should pursue. Let him devote himself to an examination of the mysteries of the same Divine Scriptures, read of Christ there prophesied, see Him represented, understand the perdition of the reprobate people according to prophecy, mourn its fulfillment, rejoice in the salvation of the Gentiles. Let him hold fast the things predicted and accomplished in the past; let him trust future promises."
Source: Mary Josephine Suelzer, trans., ACW, Vol. 4, Julianus Pomerius: The Contemplative Life (New York: Newman Press, 1947), pp. 27-28.
For an excellent compilation of quotes of the Church fathers teaching on the primacy, sufficiency and ultimate authority of Scripture, get a copy of Holy Scripture:The Ground and Pillar of Our Faith Vol III- The Writings of the Church Fathers Affirming the Reformation Principle of Sola Scriptura.