Those who believe that they believe in God, but without passion in their hearts, without anguish in mind, without uncertainty, without doubt, without an element of despair even in their consolation, believe in the God idea, not God himself.
Remember this. When people choose to withdraw far from a fire, the fire continues to give warmth, but they grow cold. When people choose to withdraw far from light, the light continues to be bright in itself but they are in darkness. This is also the case when people withdraw from God.
I feel most ministers who claim they've heard God's voice are eating too much pizza before they go to bed at night, and it's really an intestinal disorder, not a revelation.