I can't speak for the world but I have seen God's healing. I'm sorry if you choose to doubt Jesus' power to heal. I choose to believe because Jesus, including his power is real! By his stripes we are healed... Jesus is the only healer. Man is used by God to pray for peoples healing, but Jesus is the healer. My daughter was healed of a broken arm, I definitely believe in healing. I have been and also have friends who have been healed. I have seen the miracles of the power of God in my life; I know God is the same today as he was in the past. I can not explain why everyone who prays is not healed; I do believe that God is all knowing and does, as he knows what is best. I also believe that God answers prayer sometimes conditionally. The Bible says that our prayers are answered because we do things that are pleasing in his sight. Many times people only ask God to help them when they are down and out, then they ignore him when life is good. God cares more about your soul than about your health, think about this the next time you pray. God loves you, he will answer prayer but sometimes if your prayer is out of the will of God or if in his wisdom he delays, don't stop trusting him. God's delays are not denials. Prayer is answered by faith. God wants a relationship with you, not your theology or corporate/ organized religion.