The knowing of Surrender is so easy when understood properly. It's reasonably simple.
Surrender is the source of harmony, and contention is the root of discord. When one is in contention, one is not in Surrender. If you are in contention with your self (which is the case for almost everyone), you are probably in need of help or stuck forever.
Surrender implies the attainment of harmony (happiness) through the release of contention, not through the winning of argument. The point of the teacher of Surrender is never who's right. The point is always your Surrender (happiness) and eventual ability to recognize the difference between its presence and its absence.
In Surrender, nothing needs to be proven. All things flow easily and naturally. The flavor of Surrender to a teacher is the flavor of Surrender to The Divine. When you are at peace with your teacher, you are at peace with God. And when you are not, you are not.
Surrender brings peace
When the need is lost,
field of the heart discovered,
The deep self is content
in the field of truth.
It is in the surroundings of peace that the student who is willing to give up everything will have the opportunity to discover this true being, the truth of their reality, allowing it to emerge.