For anyone wanting to go down a luminous mind rabbit hole, we’ve done this before:
and
However, I’m going to take a different approach to this.
If we just think of the mind as another sense door then this could make sense. Is your ear inherently peaceful, sure. Does that make it some everlasting permanent essense thing? Nah, not really. When there are sounds, consciousness and contact the ear is disturbed and the little ear receptors vibrate. Could it be that the same is true for thoughts, consciousness and contact and the mind? It seems so. And unlike the 5 external senses, impingement is far more determined by volition.
This is a bit of a stab in the dark, but seems to align with what the Venerable is saying.