大乘起信論裂網疏 6.80

6.80

"Therefore, one should carefully examine and observe, and give rise to this thought: 'All these are because my roots of goodness are slight and thin, and my karmic obstacles are heavy and thick, so that I am deluded and confused by demons, ghosts, and the like.' Having known this, one contemplates that all of them are mind-only; when one contemplates in this way, they immediately vanish in a kṣaṇa."