How Were People Forgiven And Saved Before Jesus?

If Jesus had to die to pay the sin debt of humanity, then how were people saved before Jesus came to earth and died on the cross?  For example, how were people in the Old Testament saved, how could they go to heaven if not through Jesus?  In Genesis, God told Abraham that his faith had been counted to him as righteousness. What does that mean?  In what did Abraham have faith?  And how did that faith save him? God explains this mystery in the New Testament portion of the Bible. In this podcast, Andy discusses those scriptures to fully explain the answers to these questions.