Again and again, I was told in Novardok that the Tzadikim of Shaul HaMelech’s army used to fall in battle because they spoke Lashon Hara, and the Baalei Avoda Zara from Achav’s army used to win because they didn’t speak Lashon Hara. (Yerushalmi). A person has no idea how dangerous it is to be a negative-critical type. He fools himself because he’s a Masmid, or M'zakeh HaRabbim, or a Baal Tzedaka or Baal Chesed... But if you don’t work on stubbornly being an Ayin Tova, then you can Chas V'shalom fall into Sin'as Chinam and be an accomplice for our Galus and an: עיכוב hindrance for Moshiach to come.
Moshiach is one big piece of Ayin Tova. (R' Pinchos Koretzer). Learn Sefer Shmuel about how Dovid saw only good in his worst enemies, like Shaul, Avner, and Shim'i ben Gera who cursed him in public, yet Dovid took HIM to be his son, Shlomo’s Rebbe! (Gemara).
