Yes-you did read it correctly-that's "Internal".
We all have that compass within us that (should) tell us what we should do, not do; believe or reject; follow or turn away.
That is the Truth Internal.
It does not need one to follow any particular religion-or any religion at all. There are certain precepts we set for ourselves, without the constraints of labels, that may define us as individuals. I like the "Still small voice" image.
The problems we face, or so it seems to me, are centred around our denial of this voice. We follow trend. We follow fashion. We follow the charismatic and the false "celebrities". We don't stop to determine if their way follows the way of our needle.
It's a simple idea. Perhaps we should all be still now and then. Still and listen to that voice.