Why Does Reciting the Buddha's Name Make Nightmares Disappear?

When the mind consciousness recollects the Buddha in daily life, it perfumes the manas until it is transformed; the manas holds the Buddha in its heart and also understands the benefits of recollecting the Buddha. Thus, when encountering a dangerous situation in a dream, it directly raises the thought of the Buddha and utters the Buddha's name—the name comes out spontaneously, without the mind consciousness needing to deliberate and decide to recollect the Buddha. Being able to recollect the Buddha in a dream is true recollection of the Buddha (buddhānusmṛti), and one can then resonate with the Buddha. Once the Buddha's power blesses and protects, the nightmare disappears. The environment turns according to the mind; dreams are even more illusory than waking reality, so as soon as the mind of recollecting the Buddha appears, the nightmare realm vanishes, and the state of mind transforms from suffering into calm and serenity.