Don’t recall. Let go of what has passed.
Don’t imagine. Let go of what may come.
Don’t think. Let go of what is happening now.
Don’t examine. Don’t try to figure anything out.
Don’t control. Don’t try to make anything happen.
Rest. Relax, right now, and rest.

Tilopa (988 CE-1069 CE), Tilopa was an Indian Buddhist monk in the tantric Kagyu lineage of Tibetan Buddhism.