The Heart Plane
There are quite a few biblical references to hearts of humans being connected in some way together.
One of the most obvious and direct verses is Psalm 33:15. From the Hebrew, it is read like: "The fashioning together of their hearts, the discernment towards all of their doings." The word YeKheD there is used in many other verses to mean "together".
Another possible older reference to human hearts being associated together, is in Genesis 6:5. This refers to the situation on earth that was before the great flood wherefrom Noah was saved. The verse notes that human activity was very bad then, and their thoughts were evil often. It mentions where those thoughts were - in a heart. However, the Hebrew word was: "his heart", which is a singular heart. And obviously the Hebrew language had the ability to express plural hearts, as was the case in Psalms 33:15. But the word in Genesis 6:5 denotes a singular heart for the noun HeADeM, the human (perhaps a reference to a formal human subbody).
A reference in the Gospels: Mark 7:21. Christ was speaking about uncleanness coming from evil that goes out from a man. He explained that evil thoughts come out of a heart. Yet, a phrase in the verse in the Ancient Greek translates as: "the heart ((singular)) of the humans ((plural))". Why would the word "heart" be singular if it was "of the humans" which were plural? Unless - the hearts of each of those humans were connected or associated to form a single heart, which I call a heart-plane.
One possible reason for this association of hearts is that since the Deity sees all activities of each person's heart, all those knowledges are combined in His knowledge, which associates them.
I call it a plane. A coordinate system of 3 axises (xyz) may have three planes, each of which has a 2-D plane to travel, between points in x-y plane, y-z plane, and x-z plane. So, if you think of hearts as being 3D regions in which 3D thoughts (with their xyz points) may occur, and even 4D with time, then you may add another axis or plane that connects those regions, each like nodes in which or where thoughts occur. So this heart plane would be like a line or 2D plane (or elsewise) that connects the hearts that way, which makes them all like a larger structure. Like a system of telephones that is made of many telephones inter-connected.
This is important for many reasons. One is that this would be supportive of the possibility of telepathy - and to some extent, extra sensory perception. If the means of generating (audible) thoughts is in, of, or by the heart (out of the heart, the mouth speaks; Matthew 15:18), then connection of each person's heart together, may allow for thoughts (or at least proto-thoughts related to other-conscious activity or inactivity of animalians) to effectively move across that connected space or heart-plane.