As long as there is still a sense of a separate self hanging around, there will inevitably be inflation. Or more precisely, the inherent neutrality is split into a sense of being better and worse than the rest of the world.
Inflation can especially easily happen when the soul level surfaces in its many forms… as alive presence, indwelling God, luminosity, fertile darkness, luminous blackness, or in whatever other form it takes. On the inherent neutrality of all this, stories are placed, and they are inevitably believed in, to some extent at least… oh – I must be special since this is happening to me, finally – all my years of practice is paying off!, I know something others don’t, I am at a more advanced level than others, and so on. As usual, the variations are endless. And it will happen, even if we know, intellectually, the illusion and mistake that is behind it.
Technically, inflation is when the “ego” takes on something as its own, when it really doesn’t belong to the ego. The term “ego” here means (a) a belief in the story of a separate self, and (b) that sense of a separate self is then placed upon this human self. So all that is happening is that what occurs outside of that boundary is, to some extent, placed within the boundary, as if what is inside somehow possesses, or can take credit for, what is outside.
In Zen and some other traditions, they deal with it by not talking about it, and if a student brings it up, the teacher will ignore it, or (figuratively or literally) give the student a smack with the stick.
It works, to some extent, but is also a crude way of dealing with it. Most of the time, it just creates more confusion for the student.
To me, it seems more effective to (a) allow the inflation (it is there anyway, so may as well allow it), and (b) inquire into it to find what is already more true.