Musar su Salmi 143:2

But he who is not willing to overlook transgression [against himself], or act with kindliness, justice dictates that he too will be dealt with only strict justice. Now see - who is there and is there anyone who could stand up if the Holy One, blessed be He, were to hold him up to strict justice?! King David prayed saying: "do not enter into judgment with Your servant, for no living being can be found vindicated before You" (Tehilim 143:2).

But if he guards all three properly, namely, purity (temimut) of thought, examination, and trust - then he will walk securely in truth and no evil will befall him, as Chana said in her prophecy: "He will guard the feet of His pious ones" (Shmuel 2:9), and likewise David said: "He shall not forsake His pious ones; they will be guarded forever" (Tehilim 37:28).

Behold the story of Gedalia ben Achikam where it is clear to our eyes that due to his great Chasidut to not judge Yishmael ben Netanya negatively, nor to accept an evil report, he said to Yochanan ben Kareach "you are speaking falsely of Yishmael" (Yirmiyahu 40:16). What resulted from this? He was murdered, the Jews went into exile, and their last ember was extinguished. Scripture attributes the murder of these people as if Gedalyah himself murdered them, as our sages of blessed memory, said (Nida 61a) on the verse: "all the bodies of the men whom he had killed through Gedaliah" (Yirmiyahu 41:9).