The article is really good.
These are 2 points, which I like most:
For instance, we’re sitting here thinking, “Now I am Chenrezig, I am white, glowing, I have four arms,” and so on and so forth. This is so important, but we don’t really beleive this. It’s our fundamental delusion that we sit there thinking that really I am Mary Smith, pretending that I am Chenrezig – when of course the truth is that I am Chenrezig pretending to be Mary Smith.
All thoughts – good thoughts, bad thoughts, stupid thoughts, wise thoughts – are they play of the dharmakaya, the wisdom of the Buddhas
If we practice Heruka and our name is John, it is not John pretending Heruka. But Heruka pretending John.
For no. 2, Saraha actually mentioned that whatever thought you have, your current thoughts, are actually Mahamudra. Whether you think it is sinful thought or pure thought, they are basically Mahamudra. Because we differentiate it as sinful or pure, we can't see the true nature of that thoughts.