Very truly I tell you, we speak of what we know, and we testify to what we have seen, but still you people do not accept our testimony. I have spoken to you of earthly things and you do not believe; how then will you believe if I speak of heavenly things?
If ever people were talking at cross purposes it was these two. Nicodemus, being logical, down-to-earth, matter-of-fact; Jesus speaking of heavenly things; the two had no point of contact.
What we have to convince people of is that the physical is not all there is. Dawkins and his cohort would insist that it is, but the whole idea of Christianity is predicated on that there is more than the physical.
Do you have a spiritual life? Do you appreciate the supernatural and do you relate to it in prayer?