"It is necessary...to realise, not that [one] should not judge, but that he cannot. In giving up judgement he is merely giving up what he did not have. He gives up an illusion; or better, he has an illusion of giving up. He has actually become merely more honest. Recognising that judgemnet was always impossible for him, he no longer attempts it. This is no sacrifice.
...
"the recognition that judgement in the usual sense is impossible. This is not an opinion but a fact. In order to judge anything rightly, one would have to be fuly aware of an incoceivably wide range of things; past, present and to come. One would have to recognise in advance all the effects of his judgements on everyone and anything involved in them in any way. And one would have to be certain there is no distortion in his perception, so that his judgemnet would be wholly fair to everyone on whom it rests now and in the future. Who is in a position to do this? Who except in grandiose fantasies would claim this for himself?
"Remember how many times you thought you knew all the 'facts' you needed for judgement, and how wrong you were! Is there anyone who has not had this experience? Would you know how many times you merely thought you were right, without ever realising you were wrong?
...
"Therefore lay judgemnt down, not with regret but with a sigh of gratitude. Now you are free of a burden so great the you could merely stagger and fall down beneath it. And it was illusion. Nothing more...[Now] where he came to judge, he comes to bless. Where now he laughs, he used to come to weep.
"It is not diffcult to relinquish judgement. But it is difficult indeed to try to keep it. [One] lays it down happily the instant he recognises its cost. All of the ugliness he sees about him is its outcome. All of the pain he looks upon is its result. All of the loneliness and sense of loss; of passing of time and growing hopelessness; of sickening despair and fear of death; all these have come of it. And now he knows that these things need not be. Not one is true. For he has given up their cause, and they, which never were but the effects of his mistaken choice, have fallen from him..."
--A Course in Miracles