This may have been asked already but why do non believers have to see, touch, taste or smell to believe in God

Do atheist not ever accept anything on faith? I know the Bible is hard to comprehend, but if only people that did not believe, knew the peace and fullfillment of feeling the Holy Spirit within. I read all the time that some would prefer hell to being in heaven if they believed in either and I don't understand that concept either. Could someone please explain this reasoning to me. As a Christian I don't profess any kind of perfection because people are human no matter their belief but why hell over heaven? Why not believe with your heart instead of totally with your mind?