Interesting to note that the very first bubble of Evil we see is the one that very nearly pushes Rand onto the blade of Lan during a training session.
I see this as both an allegory on duty and danger and also about fate being inexorable and outside of the control of Rand.
I am early on in my series re-read, currently on The Shadow Rising and I completely forgot about this bubble of evil which appears to the Tav'eren: I think Jordan really wanted to play into each of the boys themes here with the allegorical bubbles, let me explain why I think this:
Rand: So Rand...