If God is omnipresent - all-present (meaning he is everywhere) - then why would someone have to go to church or talk to a pastor to experience him? If you opened up your heart to his presence at a concert (or anywhere for that matter) like others have claimed to have done, why would you not feel him there also? How can you say others haven't felt the same presence you talk about while they were at a concert? Expand your mind bro. What if you got stranded on a desert island with no bible and no church? Should you not be able to walk with God then? And if you could walk with God then, why can't you walk with God now? Or at a concert? Or anywhere for that matter. Don't limit your experiences to a building; that's what the institution of religion wants you to do. They want you to conform and obey their rules. They want you to donate and contribute your time to their needs. Free yourself! God is outside of that building. God is in the children that need your help, or in the old lady that needs help crossing the road. God is in the river as you sit and watch the ripples dance with your thoughts. God is in the trees, flowers, weeds, birds, mountains, plains, horizons; He is everywhere!