W-pI.131.11:5-8 For several minutes watch your mind and see, although your eyes are closed, the senseless world you think is real. Review the thoughts as well which are compatible with such a world, and which you think are true. Then let them go, and sink below them to the holy place where they can enter not. There is a door beneath them in your mind, which you could not completely lock to hide what lies beyond.

W-pI.131.12:1-2. Seek for that door and find it. But before you try to open it, remind yourself no one can fail who seeks to reach the truth.

~A Course in Miracles