You can access the energy of the different types because you now see through more than one lens of personality. No magic is needed to bring this about. Knowledge of the Enneagram can change you. Knowledge can change you if you are willing to use it in the process of introspection. Introspection is the process of becoming self-aware.
Introspection is actually risky.
Do not attempt introspection unless you willing to risk being transformed out of the comfort zone of your type. Becoming aware of hidden structure of your personality sets you free but also gives you full responsibility for yourself. With self-awareness you wake up to your compulsion and avoidance. With self observation you usually catch yourself having done the same thing, the compulsion, once again. To see this in action you only have to listen to that voice that talks to you.