This is a reflection more than a sermon. It is based on Abram and Sarai being called away from everything they know, everything that shaped who they are, everything that gives safety and security to be the means through which God might restore the human and non-human creation and be able to live in harmony with God’s original intention for the world.
John (like Paul) presents Jesus as the means by which this promise, this hope, this covenant is fulfilled. And Nicodemus is invited to leave all that he knew, all that shaped who he was and gave him safety and security to join in this work.
You can find the text of this reflection here