Jesus says to Nick, "Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God." So we have a source of birth. A spiritual birth. Note that Jesus doesnt just say spirit as in "we've got spirit yes we do, we've got spirit how bout you?"
It's okay to only read what you want to read, but don't expect to ever have a clue in hell what the text is saying if you do.
If we read on, we see exactly what it means to be 'born of water and of the Spirit' (emphasis added):
Those who believe in him are not condemned; but those who do not believe are condemned already, because they have not believed in the name of the only Son of God. And this is the judgement, that the light has come into the world, and people loved darkness rather than light because their deeds were evil. For all who do evil hate the light and do not come to the light, so that their deeds may not be exposed. But those who do what is true come to the light, so that it may be clearly seen that their deeds have been done in God.'
Does this mean that in order to get inspiration I need to work at it?