Jesus had two very stern comments about the experience we call "salvation". First, in John 3:3, "Jesus replied, 'I tell you the truth, unless you are born again, you cannot see the Kingdom of God." Second, in John 6:56, "Anyone who eats my flesh and drinks my blood remains in me and I in him." Both of these statements prove what is the requirement to enter into the gates of Heaven. You must be a resident DNA holder of the King of Kings, Jesus Christ of Nazareth.