Who create God? Why there is always a confusion, misunderstanding and debates on the topic of God? Why do people want God? Isn't we are the one to make everything possible? We don't have to give our faith and hope to God. Isn't it ? Why God exists in all people mind? 
God exists in people's mind because people have faith in Him. Those people who believe and have faith in Him always puts God in thei center of their life, so, when problems and trials come to those people who believe in Him, they still find peace in the midst of problems and trials because God exists in their mind and heart.