If the mind is still and free from thought, there is nothing present to the mind for which there is a concept, except perhaps concepts like 'samadhi', which doesn't help if you have never had the same or similar spiritual experience, which apparently you have not.
Do not worry about how to know...
You the thinker are not the chair you are thinking about, they are two different things, that is why this mindset is referred to as duality.
The degree of prerequisite understanding required to grok what has been explained a number of times apparently is still not sufficient. Nevertheless I...
A thought about God is one thing, and the thinker of the thought about God is another thing, that is duality.
Meditation where no conclusions are made, and simply nothingness is the result, is still mind meditation, ie., non-duality. Keep it up daily and in time, a spiritual transcendent mind...
It appears you are stuck in the dualistic mental mode and can't understand that if your mind is still and free from thought, there is no duality.
Iow, your dualistic mind can not now or ever realize non-duality. However, if you the creature are able to meditate and still the mind, the...
There is you and a thought about God,, you and God, that is duality!
In still mind meditation on God, it is realized that God is merely expressing itself, and the expression (you) is an indivisible aspect of God the expressor. This state is non-dual. The moment you think about it, there is...
No, when you are in still mind meditation, the brain is not thinking, it may be in the theta brain wave state, or even delta, but the mediator is not asleep.
First you must learn to still your mind, until you are able to do that, any description of spiritual experience would not be recognized...
Ok, so God is all there is, and you are an expression of God. So when the natural man thinks of God, they think of God as being separate from themself. Iow, there is duality, there is God and there is the thinker of God. However the truly religious man does not think of God, but rather still...
The brain is working all the time but it is not thinking all the time. You must be aware of brain waves, beta waves are present in the awake thinking state, but not in the theta dream state and deep meditative state. And the brain is certainly not thinking in the Delta wave state.