Romans 3:19-20 // Purpose of Law

Based on Romans 3:19-20

19 Now we know that what things soever the law saith, it saith to them who are under the law: that every mouth may be stopped, and all the world may become guilty before God. 20 Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.

Everything in God's law is to show people that are not keeping this law that they are breaking it. If God's law was just "love everybody" most people would pretend that they had never sinned. Even murderers might claim that they did not hate their victim, therefore they had not sinned. The law needs to be specific so that people know when they have broken it. God's law is no different, and it includes injunctions like "Thou shalt not make unto thee any graven image... Thou shalt not bow down to them nor serve them..." and "Remember the Sabbath Day to keep it holy..." all the commandments are clear-cut and specific.
It doesn't make sense to me what people say about sinning millions of times every day. That is more than an exaggeration, to me that seems slanderous towards God. God has given us clear rules, if I murder I am a sinner, if I want to murder I am a sinner, if I have a murderous thought I am a sinner because if I had power I would have carried it out (this is where the false idea that power corrupts gets its source; power doesn't corrupt, it reveals) and anger is generally a murderous feeling. This is clear, just and convicting; I am sure I would be a murderer if I was born with absolute power. But I don't get angry millions of times each day, not even thousands, or hundreds, it would be a very bad day if I got angry 10 times. Real sin is clearly defined in the Bible, and although there is nothing unreasonable about it, you have trampled all over it anyway. It is only the grace of God that stops us from being fully evil and sinning continuously, but the did not affect this change, the law shows that you and I need Jesus.