During Self Inquiry one can try to figure out how vrittis (mental modifications, thought waves) originate or how thoughts pop up every now and then making us do things like puppets are made to do things. This eventually leads us to know that we are programmed and are not really the doers. Loss of doership is the key in the final stages of Self Realisation where the one who was doing the Self Inquiry surrenders knowing that it is not the doer.

[Panchadasi Chapter 8, Kootasthadeep Prakraran, Verse 20]

Meaning: All the vrittis are born sequentially after gaps. When one vritti is destroyed, another one is born. One should understand the origin of third, fourth etc. vrittis. All vrittis disappear during deep sleep, unconscious state, samadhi and not even one remains out of those.