The Gospel is meant to be heard.
“As Moses lifted up the serpent in the wilderness, even so must the son of man be lifted up; so that whoever believes in Him will in Him have eternal life.” (John 3:14-15)
Nicodemus asked a question of Jesus and received an answer that confused Him. “You must be born again.” Jesus gave a really good explanation of how this new birth thing works. The problem was it was explained in heavenly terms. It is a mystery. And because it is a mystery Jesus tells us to lift Him up. Let us do that with our voices and written words so that others will believe and have eternal life.