The evil is null, is nought, is silence implying sound;
What was good, shall be good, with, for evil, so much good more;
On the earth the broken arcs; in the heaven, a perfect round."B
B: Abt Vogler.
The "apparent failure" of knowledge, like every apparent failure, is "a triumph's evidence for the fulness of the days." The doubts that knowledge brings, instead of implying a defective intelligence doomed to spend itself on phantom phenomena, sting to progress towards the truth. He bids us "Learn, nor account the pang; dare, never grudge the throe."
"Rather I prize the doubt
Low kinds exist without,
Finished and finite clods, untroubled by a spark."A
A: Rabbi Ben Ezra.
Similarly, defects in art, like defects in character, contain the promise of further achievement.