Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
All Commentaries on Ecclesiastes 12:13 Go To Ecclesiastes 12
John Chrysostom
AD 407
If fear of God comes from knowledge but knowledge is going to pass away, as Paul says, then we shall be completely destroyed when there is no knowledge. All that we are will be gone, and we shall be in a state no better but much worse than irrational beings. For in knowledge we have the advantage over them, whereas in all other things pertaining to the body they surpass us by far. Against the Anomoeans, Homily