How do you directly observe anatta?


There is a Dhammapada verse which has a nice way of putting it:

Dhammapada, chapter 5 verse 3:

"The fool worries, thinking, “I have sons, I have wealth.” Indeed, when he himself is not his own, whence are sons, whence is wealth?’

The bold in Pali :
Atta hi attano natthi ( he ,himself, is not his own)

There is no indication that atta is an illusion, only that it is not yours,it cannot be owned.