Every man is proud of what he does well; and no man is proud of what he does not do well. With the former, his heart is in his work; and he will do twice as much of it with less fatigue. The latter performs a little imperfectly, looks at it in disgust, turns from it, and imagines himself exceedingly tired. The little he has done, comes to nothing, for want of finishing.
The purpose of the whole [the Comedy] and of this portion [the Paradiso] is to remove those who are living in this life from the state of wretchedness, and to lead them to the state of blessedness.