How would you say our usual mode of mind creates a barrier to the heart?
Our scattered thinking can create a veil of confusion around the heart, denying us access to its one wish.
Which is?
The heart in its pure state wants only one thing, to awaken to the Beloved's presence, to actually awaken to what Self is.
And how else could this heart state be described?
As a state of awareness without doubts, hesitations, counterarguments, endless dialogs (actually monologues) and the like.
As opposed to what?
Well, you can look at the ego-mind as a system that siphons the heart's vital energies into its various wants and programs--bits of conditioned responses usually at odds among themselves.
Any solutions?
Start to repolarize the mind with reflections of truth and develop a sense of smell to recognize those reflections.