Essence of mind is calm awareness; movement of mind is phenomenal emergence at the 6 sense doors. Essence and movement are also the same thing: like energy and matter, the ocean and its waves, the sun and it’s rays, or a movie screen and the sounds/images projected on it. Seeing them as separate cultivates the duality of clinging and rejection.
To “meditate” simply means to maintain a presence with both the calm essence and active movement of mind (recognition and continuation of pure, non-dual presence): there is nothing to “meditate on”. Any thoughts, desires, etc should be simply allowed to self-liberate at the very instant of their arising through simple present awareness – these conditioned phenomena are all apertures into the ground of Still and Silent Presence; of Primordial-Core Awareness.
“Truth is one, many is its names” (Rig Veda). “Non-dual” is the inseparability of the Relative appearance (Christ as Particular) and the Absolute emptiness (YHWH as Universal) — [Practice/Realization/Awakening of the sameness of Christ/YHWH is (the result of) Spirit]
[Alpha/Omega and the tabernacle of God is with men: Revelation 21]
The process of conceptual cognition categorizes sensory cognition and all of mental cognition (which includes conceptual cognition itself) as “this”s and “that”s: mental objects that represent, are derived from, and resemble (or construct?) external (material) perception and that filter internal (mental) perception…
…this is the root cause of duality – physical and mental things we “know” are the causes and the ways we know them are the effects; direct experience and our conceptions of experience are distanced and bifurcated in time.
So, reliance on conceptual understanding is limited to a shallowness (“grossness”) of understanding reality. A depth (“subtlety”) of understanding is encountered through non-conceptual knowing: something like awareness itself.
Form: quality of solidity, permanence, separateness, continuity, and definition
Emptiness: quality of insubstantiality, impermanence, indistinctness, discontinuity, and ambiguity
Non-Duality [“Deep” Mindful Awareness; Contemplation]: recognition that existence and experience are permeated by the qualities of form and emptiness – they are aspects of each other and they condition each other: “Form is emptiness, emptiness is form.”
“There is one body, one Spirit, just as you were called in one hope of your calling; one Lord, one faith, one baptism; one God and Father of all, who is above all, through all, and in you all.” -Ephesians 4:4-6