For in a contest there is much labor needed--and after the contest victory falls to some, to others disgrace. Is the palm ever given or the crown granted before the course is finished? ... Therefore no one can receive a reward, unless he has striven lawfully; nor is the victory a glorious one, unless the contest also has been toilsome.
St. Ambrose of Milan
Chapter 15, Three Books on the Duties of the Clergy, 4th century
It is the sole and peculiar property of the Substance that transcends all, to be able to bestow on men the indwelling of the Holy Spirit, and make those that draw near unto It partakers of the divine nature.
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homily 10., 4th Century
Repentance is the renewal of baptism and is a contract with God for a fresh start in life.
St. John Climacus
Ladder of Divine Ascent Step 5:On Penitence, Paulist Press pg. 121, 6th century
'And He is the expectation of the nations' ... Therefore it is said to Moses, 'Remove the sandals from your feet' (Exo. 3:5). Otherwise Moses, who was chosen as leader of the people, might be thought to be the bridegroom of the Church.
St. Ambrose of Milan
Seven Exegetical Works, 4.22, 4th Century
But this exists in Christ, not as a thing received, nor by communication from another, but as His own, and as belonging to His substance, for He baptizes in the Holy Spirit.
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homily 10., 4th Century
The Word, therefore, that became man is, as it appears, God, and the fruit of the Father's substance ...Yes! We too affirm, without fear of contradiction, that the Word being God as of His own fullness bestows the Holy Spirit on such as are worthy;
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homily 10., 4th Century
Everyone that preaches true faith and good works, what does he do but prepare the way of the Lord so that He may come into the hearts of his hearers, and may make straight the path for God, forming right dispositions within them by the words of his exhortations?
St. Gregory the Great
On the Mystical Church, P. G. 76 (cols 1159-1170) in Toal, I:89, Sixth Century
Do you see that both by the words of the Prophet Isaiah and by his own preaching this one thing is manifested alone: that not only had he come making a way and making ready beforehand, not bestowing the gift which was the remission, but he prepared besides the souls who were about to receive the God of all?
St. John Chrysostom
Commentary on St. Matthew, P. G. 57:142, (col. 187), Fourth Century AD