History of Redemption Part 4

This is the 4th part of the 5 part series. Is being 'born again' necessary for sins to be put away? What is it that the Spirit of God shows those chosen in Christ by the Father? How is the Word of God the only Way to have Christ revealed in a chosen sinner? What does it mean to have Christ revealed in you? Why do men try to 'philosophize' the Gospel? Was Nicodemus 'born again' when he came to Christ by night? Why did Nicodemus have such a hard time understanding what Christ was telling him? How is Christ revealed in the heart?