Musar for Deuteronomy 1:27

And sometimes the cause of habituation to their sin[(lashon hara)] originates in the trait of nirganuth, as [in the instance of] the man whose nature it is to complain and to fume and to find fault with his friend always, against his acts and against his words, even though his friend is completely whole-hearted with him and seeks no occasion against him. And he [the complainer] judges all things in the scales of liability and not of merit, and converts every unwittingness to malice and suspects his friend of being motivated by hatred, as it is written (Devarim 1:27): "And you grumbled in your tents, and you said: 'In the L-rd's hatred of us He took us out, etc.'" One who is afflicted with this evil trait will never escape the sin of lashon hara; for whatever his friend does or says, it will seem to him as if only he were intended.