Calling Upon the LORD's Name

Why do some people deceive children with the ’sinner’s prayer’? How did Cain and Abel learn about the way to approach God? How do we see that God Himself said that in order to put sin away there needed to be a blood sacrifice? Why did the sacrificed animals have to be perfect? Why did Adam and Eve try to cover themselves with the fig leaves? What did the LORD do to cover Adam and Eve’s sin in picture? What is the robe of righteousness? Can you come to God in any other way but Christ? What did Eve mean when she said that God gave her a man child? Where did the Seed of Mary come from?