No matter how fancy and metaphysical a doctrine sounds, it was a human experience first. The doctrine of the divinity of Christ, for instance. The place it began was not in the word processor of some fourth-century Greek theologian, but in the experience of basically untheological people who had known Jesus of Nazareth and found something happening to their lives that had never happened before.
Unless you can somehow participate yourself in the experience that lies behind a doctrine, simply to subscribe to it doesn't mean much. Sometimes, however, simply to subscribe to a doctrine is the first step toward experiencing the reality that lies behind it.