Romans 5:20, The law [Torah] entered. The Scriptures reveal that the Torah pre-existed Moses and Mount Sinai. So what is Paul talking about in this passage when he says that “the Torah entered”? Obviously, he is referring to the Torah in its legally codified form as given to the nation of Israel at Mount Sinai. For the nation of Israel to function in a righteous, orderly and cohesive manner, it needed the Torah in written form (in a legal format), so that the leaders of Israel could refer to it even as lawyers and judges refer to a nation’s written legal code when practicing law or making legal judgments.
The offence might abound. Of course, with the Torah written down in black and white, so to speak, and with an established and recorded legal code in place to which legal judges could refer and to which all of Israel’s citizens were held accountable, the knowledge and awareness of what constituted sin (remember, Scripture defines sin as “the violation of the Torah” in 1 John 3:4) would increase. The result was that all became painfully aware of what human actions constituted sin, and that man would have a harder time getting away with sins now that Torah was the legal code of the land with fines and penalties for its violation, and a judicial system in place to enforce the Torah.
Sin abounded…grace did much more abound. As the sinner became painfully more aware of his sin or his violation of the Torah, he also became more aware of YHVH’s mercy and grace toward the sinner—when the sinner would repent and fulfill the requirements necessary to receive atonement for his sins.