No one is perfect; we are all sinners in one way or another
For all have sinned and fall short of the glory of God
(Romans 3:23 ESV)
If we say we have no sin, we deceive ourselves, and the truth is not in us.
(1 John 1:8 ESV)
Living a moral life means taking responsibility for controlling our own behavior. If we say or even when we think we are better than people we consider to be “sinners,” we are guilty of the sin of self-righteousness.
It is not our right to look down on, criticize, judge, condemn, or try to control other people. Judgment is to be left to God. Jesus said,
“Judge not, that you be not judged. 2 For with the judgment you pronounce you will be judged, and with the measure you use it will be measured to you. 3 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? 4 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? 5 You hypocrite, 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.
Matthew 7:1-5 ESV
Jesus simply teaches that in order to pass righteous judgment on another, we ought to first examine ourselves. Let us remove the plank in our eye. Then, and only then, can we see clearly to remove the speck in our brother’s eye.
It’s concerned with the attitude of a man, not a complete absence of our judgment.