18 Even the Apostles, with their full light, show their dependence on grace.
Acts xvii. 30. The times before Christ were times of ignorance.
1 Cor. iv. 19. I will come if the Lord will.
James ii. 10. To stumble in one point is to be guilty of all.
iii. 2. In many things we all stumble.
Source: Against the Pelagians (New Advent)