The Antaryāmin, in terms of the Indian Philosophy, is related to the "inner-self", the "inner-controller" or the "inner-guidance" that exists in a person and itself manifests on an intuitive way to the one manifesting it. It recalls a teacher or a guru that resides within and once it is manifested - for a higher context of knowledge guidance - usually after one summons or prays for it, the Antaryamin comes to help. In some cases, the Antaryamin is asked to be manifested in order to resolve non-intellectual issues, also performing miracles to the one asking.
On the Hindu scriptures, we find the concept of the Antaryamin as the Inner Controller after the building of the elementary concepts regarding a deity or an ego - on a unity way - of which is controlling, somehow to a compared intelligence, the universe and all that is. This intelligence may also refer to what is called consciousness or awareness that is far superior, hence capable of doing superior things.
You made my decision
Now take hold of my hand
And I'll promise in front of the world
To be your one true man
I'll stand among my best friends
They all understand
That I'm changing for the better (yes I am)
I'm your one true man
I am your one true man
Your one true man I am
I'm gonna love you like no one man can
Your one true man, I am
Living wit me isn't easy
My life has its demands
But I want you to know that wherever I go
I'm your one true man
I am your one true man
You one true man I am...
Sometimes I get so crazy
You get so hard to hold on to
But I won't let you go
Cus I know, I know who I am
I am your one true man
Your one true man I am
I'm gonna love you like no one man can