If the law was sufficient for men, there would have been no need of Jesus to come and fulfill the law Himself. The new covenant that God made with all the people of the Earth is that they can freely come to Him and partake of Jesus' blood sacrifice for their sins. It is now the ONLY way to receive eternal life. It is simple. It is free. It is a gift. Rejecting the sacrifice means that you condemn yourself to bear the punishment of your sins. You cannot be good enough to receive eternal life - the best of us is but a filthy rag to an immaculate, perfect God. He cannot receive you unless you are washed clean, and only by the perfect Lamb of God. None in history was or is worthy but Christ, the Son.