I understand something. It's really simple but a little harder to articulate.
I sit now.
The thoughts that intrude are not.
They are memories from past.
The past does not exist, it is gone.
Same as thinking about what may happen.
The future is neither a reality or a forgone conclusion.
There is now and that is all.
So when I breath in and out when I sit.
That is all, that is now.
Intrusive thoughts are ghosts.
They are past and gone or future and not yet a reality.
The simplicity of
Not practising or improving or making changes or being in harmony with anything,
Just sitting is all there is to do.