wat does this mean?

Question

wat does this quote mean?

"We see everything through a glass, darkly. Sometimes we can peer through the glass and catch a glimpse of what is on the other side. If we were to polish the glass clean, we'd see much more. But then we would no longer see ourselves."

Answer 1

"we see through a glass, darkly"-- We concentrate on the negatives.
"Sometimes we can peer through the glass and catch a glimpse of what is on the other side."--There are still good things left in the world.
"If we polish the glass clean, we'd see much more. But we wouldn't see ourselves."--Humanity has the option to do better, but we are too selfish.

very depressing

Answer 2

Don't throw stones if you live in a glass house unless you are outside facing the opposite direction.

Answer 3

We see the faults of others easier than we see our own faults.