The calling of Nathanael and the symbolism of trees and high places

How did Jesus see Nathanael beneath the fig tree? Why does Nathanael respond with an amazed confession of Jesus’ identity? How does Jesus’ promise that Nathanael will see angels ascending and descending fit into this?

What is being born of water in John 3:5?

Is it baptism, amniotic fluid, or is John tracing a trajectory of Old Testament allusion and physical metaphor?

Water and spirit

An exchange demonstrating that it does not, and cannot, refer to baptism.