You have to fully understand, that is experience, the reality and necessity of all three of the aspects/component parts of Trinity before you can fully understand and experience its Unity. That and the fact of the primacy of ethics exists within and because of consciousness itself. Grace, necessarily consisting of an integrated Duality-Twoness necessarily contains an ethical (Duality of Self and Other) viewpoint.

Also, Grace/Trinity/Consciousness is a priori. When was the last time you picked up a pencil…and then decided to do so? Like, never.

Also remember, apropo the electric universe paradigm, electricity is one of the fundamentals of the physical universe and a Trinity itself:

[ (+ X -)  Electricity ]

[ Electro (gravity as in the magnetism of Twoness and/or within or as a result of Threeness)  ]

But without the reality and component parts of each there is no effect of Unity-Oneness.