You simply have to watch:
where does mind arise from?
Where does thought come from?
What is the source of this thought?
Dive together with this mind
to its Source from where it began.
Then you will see that you have always been Free
and that everything has been a dream.
Watch you thoughts come from nowhere.
If something comes from nowhere
how can it be anything?
How can it be anything
when it doesn’t come from anywhere?
Anything must come from somewhere.
If it doesn’t come from somewhere it is nothing at all.
So if thought comes from nowhere it must be nothing at all,
because only nothing comes from nowhere.