Light Brighter than the Sun

Bodhidharma:

"If in a dream you see a light appearing, brighter than the sun, it means your remaining habits are suddenly exhausted, and the nature of the Dharma Realm is seen. If this happens, it is the cause of achieving the Way. Only you know this; you cannot tell others.

Or if while walking, standing, sitting, or lying in a quiet grove, you see a light—whether large or small—do not tell anyone, and do not grasp at it. It is simply the light of your own Self-nature.

Or if while walking, standing, sitting, or lying in the darkness of night, you see a light as clear as day, do not find it strange; it is your own mind desiring to reveal itself.

Or if in a dream at night you see the stars and moon clearly, this indicates that the various causal conditions of your own mind are about to cease; likewise, do not tell others.

But if your dreams are confused and dim, just like walking in darkness, it signifies that the afflictions and obstructions of your own mind are heavy. This is also something you will know for yourself."

- Bloodstream Sermon (血脈論)

夢若見光明出現，過於日輪，即餘習頓盡，法界性見。若有此事，即是成道之因。唯自知，不可向人說。或靜園林中行住坐臥，眼見光明，或大或小，莫與人說，亦不得取，亦是自性光明。或夜靜暗中行住坐臥，眼睹光明，與晝無異，不得怪，並是自心欲明顯。或夜夢中見星月分明，亦自心諸緣欲息，亦不得向人說。夢若昏昏，猶如陰暗中行，亦是自心煩惱障重，亦自知。

- 達磨大師血脈論