Albert Barnes Commentary Job 11:4

"For thou sayest, My doctrine is pure, And I am clean in thine eyes." — Job 11:4 (ASV)

My doctrine is pure - The Septuagint instead of the word “doctrine” here reads “deeds,” ἔργοις ergois; the Syriac, “you say I have acted justly.” But the word used here (לקח leqach) means properly “fair speech” or “taking arguments,” that by which one is “taken” or captivated, from לקח lâqach — “to take.” Then it means doctrine, or instruction (Proverbs 1:5; Proverbs 9:9). Here it means the views which Job had expressed. Dr. Good supposes that it means “conduct,” a word which would suit the connection, but the Hebrew is not used in this sense.

And I am clean in your eyes - In the eyes of God, or in his sight. This was a false charge. Job had never maintained that he was perfect (compare the notes at Job 9:20); he had only maintained that he was not such a sinner as his friends maintained that he was, a hypocrite, and a man eminent for guilt. His lack of absolute perfection he was ever ready to admit and mourn over.