When you say "Vajrasatva purification practice" do you mean an appropriate visualization plus the hundred-syllable mantra followed by a dissolution?
If so then the answer is: no, this is not training in the Ultimate Bodhicitta, this is a preliminary practice.
If by "Vajrasatva purification practice" you don't mean the above mentioned ...
The Pali suttas are almost the same as Mahayana agamas in Sanskrit, and so would be on-topic as Mahayana-relevant content.
From Dona Sutta, the Buddha calls himself "awakened":
"Just like a red, blue, or white lotus — born in the water, grown in
the water, rising up above the water — stands unsmeared by the water,
in the same way I — born in ...
The point is that when we look out into the world and we see (say) a tree, a dog, a car, a white cloud, or whatever you like, what we're actually perceiving is color, shading, texture, apparent movement... We receive this great wash of ambiguous sensation, and in our heads we establish boundaries, conjure up structures and patterns, intuit relationships, and ...
It might be possible for you to gain the understanding you need from these two powerful excerpts. The first is from the Phena Sutta; the second is from chapter 32 of the Diamond Sutra.
The Phena Sutta
Form is like a glob of foam;
feeling, a bubble;
perception, a mirage;
fabrications, a banana tree;
consciousness, a magic trick —
this has been taught
by the ...
Fwiw Buddha compared sensuality to a dream as well. I don't think this tenet of the Dhamma is central to it because it is still open to be interpreted in favor of an eternal & underlying consciousness doing the dreaming.
As i see it, the latter point not being thus interpreted is the central tenet and what separates the Dhamma from eternalism.
But dreams are real—when you are dreaming, you are really dreaming. But their contents are not (always) true. They are like a movie, which is something you can watch, but the movie’s contents—the actors, and the action, and even often the setting—are not true. This comparison just like is not saying two things are identical, it’s comparing one thing—our life ...