Ignorance of scripture…

For from ignorance of the Scriptures have the countless evils of our time arisen; from this ignorance the plague of heresies has broken out among us so violently; from this ignorance so many live negligent lives. Just as men deprived of daylight would not walk straight, so those who do not look to the shining of the Holy Scriptures must needs be frequently sinning as they are walking in the worst of darkness.
–Saint John Chrysostom (347-407)

Time for repentance…

Since we know these things and are well aware of that terrible day and of that fire, and have in mind those terrible torments, let us turn aside at last from the path on which we have strayed. For the hour will come when the theater of this world will be dissolved, after which there will be no more contending for the prize, no more exertions to be made after the end of this life, no more crowns to be merited after the collapse of this theater. This is the time for repentance, that the time of judgment.
–Saint John Chrysostom (347-407)

Cleave to God…

For it is good to cleave to God, and to put our hopes in the Lord, so that, when we have exchanged this poor life for the kingdom of heaven, we may cry aloud: ‘Whom have I in heaven but thee? There is none upon earth that I desire beside thee.’ Assuredly, when we have found such wealth in heaven, we may well grieve to have sought after poor passing pleasures here on earth.
–Saint Jerome (c. 340-420)