Where do thoughts arise from in the first place?
This is for you to discover. It is an individual discovery.
It is like asking me how the food tastes.
If you ask someone, ‘how sweet is this dish?’, you have to taste it.
So, if you want to know where the thoughts arise, you better discover it. Thoughts are arising in you? So, you can discover it. The very process of discovery is a technique to understand another level of existence.