Charles Ellicott Commentary Psalms 143:2

"And enter not into judgment with thy servant; For in thy sight no man living is righteous." — Psalms 143:2 (ASV)

And enter not. — Divine justice has just been invoked, and now the one who appeals suddenly seems to protest against it. These verses truly summarize the apparent paradox of the Book of Job, just as the expressions also recall that book. (Job 9:2; Job 9:32; Job 14:3 and following; Job 15:14; Job 22:4, and so on.)

In one breath, Job frequently pours out impassioned declarations of his innocence, fearing that God might take him at his word and bring him to trial.

A person, in their desire to have their character vindicated before others, appeals to the just Judge, but instantly recoils with a guilty sense that no one can stand before that tribunal:

“For merit lives from man to man,
And not from man, O Lord, to Thee.”

Shall ... be justified. — This follows the Septuagint; better, is just.