Their qualities aren’t easy to describe, and the following may seem pretentious:

I heard a silent noise
and saw the white of night
as my mind was shot inaudibly
with rays of pitch-black light

A glowing darkness covered me
and filled my blinded sight
with quiet sounds of roaring calm
— a moment’s release from fright

It may all be a little too dramatic, for the intensity of meditation is quite low-key. That’s also the reason why I dropped the following two lines:

At the top of my muted voice
I cried with no sound at all

They sound good, but aren’t really true — if truth is a guideline to go by in poetry.