God is perfectly HOLY, and holiness makes any truce with sin impossible. Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience. These facts involve man in a terrible predicament. He is a sinner. The very nature of God demands separation from man and man's punishment by death.
Man is helpless to solve the problem.
He cannot deny the fact the he is a sinner, and no good works he may do can make him innocent. A man who has committed an undetected murder is not made innocent by living the rest of his life by the law. Doing other things God has required does not give us credit to apply against our sins. Once we are sinners, we are as dead men. He struck the blow which Justice required.