Enjoyably existential. The answer is to our problems is down and in, not up and out.
One of my favorite ACIM teachers. From the video: “We need a willingness to heal our mind. We need to be willing to see where we say no to peace. In fact, we only need willingness.”
Short answer: The one that works for you, that you can follow sincerely. And if you find yourself in a wasteland where you are continually seeking but not finding, then you’re not following Spirit, you’re following ego. But you can always choose again.