Random Nietzche quote and question

[Beearewhyain]

"Be careful of those who set a high value on people's ascribing to them moral tact and refinement in drawing moral distinctions! They never forgive us if they ever make a mistake in front of us (or even against us). Inevitably they become people who instinctively slander and damage us, even when they still remain our "friends." Blessed are the forgetful, for they are done with their stupidities as well."
Friedrich Nietzche

The question is (please forgive my ignorance) what eactly does this mean?

[La Lioness Priyanka]

1. umm reference to arrogant people

who feel emabarrassed at making mistakes in front of someone, and holding anger against said someone because he/she was a witness to their downfall!

[girl gone mad]

2. Alright..

I'll give it a shot.

People who get off on being judged as morally superior are likely not to admit mistakes, and in fact if you catch them screwing up, they will turn on you.

People who are forgetful (I'm assuming he's making a reference to people who forget to be morally refined) are lucky, because they will easily forget the mistakes they've made.

[La Lioness Priyanka]

3. and to add to that

they will also forgive you for the mistakes you make

[girl gone mad]

4. Exactly. n/t

[Fenris]

5. It is a comment on moral superiority complexes

Be wary of those who place a lot of stock in the fact that others think they are morally superior, or superior in judging others, for they are unforgiving when it comes to others pointing out their mistakes. Truly blessed are those who can forget their own mistakes.