Jamgon Kongtrul

 When retiring to sleep, draw the Guru from above your head into the center of your heart,

abandon the coming and going of thoughts, memories, and all mental activity,

and relax into a state of undistracted devotion and prayer.

Then the clear light will gradually arise out of deep sleep.

If you want to do the meditation of recognizing, changing, expanding, and purifying dreams, you must maintain an attitude during the day that all appearances are dreams,

and then it will be easy to deal with dreams.

If you tend to solidity appearances during the day,

then at night, even if you recognise dreams, the practice will be difficult.

Also, to cut through the intermediate existence you need to have cut through the dream experience.

If you don't realize that all waking appearances are like dreams or illusions,

then one vast mass of delusion will obscure another.