Judge not, that you not be judged.
For with the judgement you pronounce you will be judged; and the measure you give will be the measure you get.
Why do you see the speck that is in your brother's eye, but do not notice the log that is in your own eye.
Or how can you say to your brother, "Let me take the speck out of your eye," when there is the log in your own eye.
[If you really value accurate sight] first take the log out of your own eye; and then you will see clearly to take the speck out of your brother's eye.
I once met a man who explained that this was Jesus' answer to the curse on Adam's progeny -- to counter 'The Knowledge of Good and Evil' by renouncing the human tendency to find evil in people's doings, to condemn people for what they do wrong, mistakenly assuming that we know their intentions and reasons when they inconvenience us and have a right to make them suffer for that...