Jesus cried out and said, "Whoever believes in me believes not only in me but also in the one who sent me, and whoever sees me sees the one who sent me. I came into the world as light, so that everyone who believes in me might not remain in darkness. And if anyone hears my words and does not observe them, I do not condemn him, for I did not come to condemn the world but to save the world. Whoever rejects me and does not accept my words has something to judge him: the word that I spoke, it will condemn him on the last day, because I did not speak on my own, but the Father who sent me commanded me what to say and speak. And I know that his commandment is eternal life. So what I say, I say as the Father told me." (Jn 12:44-50)
Regarding the followers, Jesus speaks of those who believe in him and those who see him and those who hear him. Jesus wants his disciples to believe in him and the belief is that Jesus is sent by the father. In this, belief in Jesus is equal to belief in the Father. The disciples do see Jesus and hear him but all do not see the Father in Jesus. Seeing and hearing the Father in Jesus is what the belief is.
Rejecting Jesus and not accepting Jesus are those who are condemned. They are not condemned by Jesus but by his words. Because, his words are from the Father. Jesus has not spoken anything on his own. All what he speaks are from the Father. Jesus has spoken only what he has heard from the Father or commanded to speak by the Father.
All these arguments are given by the author to show that Jesus is from the Father and all what Jesus speaks are from the Father and in fact Jesus and the Father are one. Eternal life is in Jesus because Jesus speaks what he has heard from the Father.
