It shows its own imperial nature, the highest and the dominant nature in the man, and where the Spirit once has spoken the intellect becomes obedient, and the senses begin to serve.
Now Theosophy, in declaring that this nature of man can know God, bases that statement on identity of nature.

We can know--it is our continual experience--we can know that which we share, and nothing else.

Only when you have appropriated for yourself something from the outside world can you know the similar things in the outside world.
You can see because your eye has within it the ether of which the waves are light; you can hear because your ear has in it the ether and the air whose vibrations are sound; and so with everything else.
Myriads of things exist outside you, and you are unconscious of them, because you have not yet appropriated to your own service that which is like unto them in outer nature.

And you can know God for exactly the same reason that you can know by sight or hearing--because you are part of God; you can know Him because you share His nature.

"We are partakers of the Divine Nature," says the Christian teacher.