1 Corinthians 2:9 "9Rather, as it is written: “ No eye has seen, no ear has heard, no heart has imagined, what God has prepared for those who love Him.”
It makes no sense that a believer would be shown heaven when he supposedly has already believed. We walk by faith not by sight and we have no reason to have "an experience" because we have the Word of God.
If someone will not believe you about the Word of God why would they believe you that you had an experience?
We have everything we need in the Bible to walk by faith, those who must see to "feel spiritual" have little faith.