The following is taken from endless-satsang.com
What is Satsang
Satsang is a Sanskrit word that means "gathering together for truth" or, simply, "being with the truth." Truth is what is real, what exists. So all there is, is Truth. Whenever something increases your experience of the Truth, it opens your Heart and quiets your mind. Conversely, whenever something, such as a thought, fear, or judgement, limits or narrows your experience of the Truth, the Heart contracts and the mind gets busier. We are all equally endowed with this capacity to discriminate and experience the Truth. Thus, the true teacher, or sat guru, is within you, and satsang, or being with the Truth, is endless. You have always been here in the embrace of your true nature as aware, loving space. You have always been in satsang.
Truth is too simple for words
Before thought gets tangled up in nouns and verbs
There is a wordless sound
A deep breathless sigh
Of overwhelming relief
To find the end of fiction
In this ordinary
Yet extraordinary moment
When words are recognized
As everything else
(From "Gifts With No Giver" a book of non dual satsang poetry by Nirmala)