The Shepherd of Hermas

Just as good vineyards when they meet with neglect, are made barren by the thorns and various weeds, so men, who have believed, and fall into these many occupations, which have been mentioned above, are deceived in their understanding, and understand nothing completely about righteousness. But even when they listen concerning the Godhead and truth their mind is taken up with their business, and they understand nothing properly.

But they who have the fear of God, and inquire concerning the Godhead and truth, and have their heart towards the Lord, perceive quickly and understand all that is said to them, because they have the fear of the Lord in themselves; for where the Lord dwells, there also is great understanding. Cleave therefore to the Lord, and you shall understand and perceive all things.

Hear, now, said he, foolish man, how grief[*](Grief and the Holy Spirit) wears out the Holy Spirit, and again brings salvation.

When the double-minded undertakes any work, and fails in it because of his double-mindedness, this grief enters into the man, and grieves the Holy Spirit and wears it out.