Quote from A Course in Miracles Text Chapter 18 - THE PASSING OF THE DREAM.

T-18.II.3. You do not find the differences between what you see in sleep and on awaking disturbing. 2 You recognize that what you see on waking is blotted out in dreams. 3 Yet on awakening, you do not expect it to be gone. 4 In dreams you arrange everything. 5 People become what you would have them be, and what they do you order. 6 No limits on substitution are laid upon you. 7 For a time it seems as if the world were given you, to make it what you wish. 8 You do not realize you are attacking it, trying to triumph over it and make it serve you.