In the first paragraph of the Introduction of the workbook lessons it says:
A theoretical foundation such as the text is necessary as a background to make these exercises meaningful. Yet it is the exercises which will make the goal possible. An untrained mind can accomplish nothing. It is the purpose of these exercises to train the mind to think along the lines which the course sets forth.
THE AUDIO’s OF THE FIRST 50 LESSONS
Introduction and Lesson 1
Introduction and Lesson1: Nothing I see means anything
Lesson 2
I have given all I see all the meaning it has for me
Lesson 3
I do not understand anything I see
Lesson 4
Introduction and Lesson1: Nothing I see means anything
Lesson 5
I am never upset for the reason I think
Lesson 6
I am upset because I see something that is not there
Lesson 7
I see only the past
Lesson 8
My mind is preoccupied with past thoughts
Lesson 9
I see nothing as it is now
Lesson 10
My thoughts do not mean anything
Lesson 11
My meaningless thoughts are showing me a meaningless world
Lesson 12
I am upset because I see a meaningless world
Lesson 13
A meaningless world engenders fear
Lesson 14
God did not create a meaningless world
Lesson 15
My thoughts are images that I have made
Lesson 16
I have no neutral thoughts
Lesson 17
I see no neutral things
Lesson 18
I am not alone in experiencing the effects of my seeing
Lesson 19
I am not alone in experiencing the effects of my thinking
Lesson 20
I am determined to see
Lesson 21
I am determined to see things differently
Lesson 22
What I see is a form of vengeance
Lesson 23
I can escape the world I see by giving up attack thoughts
Lesson 24
I donor perceive my own best interests
Lesson 25
I do not know where anything. is for
Lesson 26
My attack thoughts are attacking my invulnerability
Lesson 27
Above all else I want to see
Lesson 28
Above all else I want to see things differently
Lesson 29
God is in everything I see
Lesson 30
God is in everything I see because God is in my mind
Lesson 31
I am not alone in experiencing the effects of my seeing