It was impossible, of course, for any Israelite or any one else to keep "all" the commandments of the law (James 2:10), and therefore they were all under the "curse" of the law (Deuteronomy 27:26). All men were already under God's universal curse because of sin (Genesis 3:17-20), but now the curse becomes more explicit because the definition of sin has become more explicit. No one in Israel could any longer offer the excuse that they did not know what sin was because the law as given to Moses had spelled it out quite clearly. "What shall we say then? Is the law sin? God forbid. Nay, I had not known sin but by the law" (Romans 7:7).

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8