Letting go is only possible for short periods. We need some discipline to bring us to “letting be.” We must walk a spiritual path. Ego must wear itself out like an old shoe, journeying from suffering to liberation. The truth of the spiritual path, the practice of meditation, is the Fourth Noble Truth taught by the Buddha.
From “The Four Noble Truths” in Cutting Through Spiritual Materialism by Chögyam Trungpa, page 153