Note 7 at Gal. 3:22: The Old Testament scripture has "concluded all under sin" (Rom. 3:9-20). This phrase "concluded all under sin" is a technical term used for prisoners being confined or imprisoned. Paul is speaking of all mankind being imprisoned and subject to sin and its bondage. This could be translated "everybody in the world is controlled by his strong desire to sin" (UBS Handbook, p. 79). The law is what God used to make this strong desire come alive in us (see note 5 at Rom. 7:11, p. 788).

So Paul is saying that God has condemned all men because of sin so that all the condemned may go free through faith in a savior. Because of sin, no one has an advantage over anyone else in obtaining righteousness. All the ground is level at the foot of the cross. Deliverance from sin and righteousness comes not by observance of the law but through faith in Jesus Christ (Rom. 7:24-25; 11:32).