Charles Ellicott Commentary Romans 10:5

"For Moses writeth that the man that doeth the righteousness which is of the law shall live thereby." — Romans 10:5 (ASV)

For Moses describes.—The Law required an actual literal fulfilment. Its essence consisted in works. “The man which doeth these things shall live.”

By them.—The true reading is probably in it—that is, the righteousness just mentioned. “The man who doeth this righteousness” (according to a more correct text) “shall live in and by it.”