In this chapter Jesus heals a lame man. He claims to be the Son of God and he declares that the Father's testimony of him is true.
In John chapter 4, Jesus speaks with the Samaritan woman. Many Samaritans believe. He heals an official's son.
John chapter 3 is where Nicodemus comes to Jesus at night and Jesus tells him he must be born again. Jesus explain him much God loves the world and John the Baptist exalts Jesus.