If I can add some clarity, I think you inadvertently (1) blended Christianity with a kind of pantheism, and (2) took "outside" to only mean "not spatially colocated".
1. In Christianity, God is "present" everywhere only in the sense that there is no possible circumstance in which God would fail to have complete knowledge and power to act. We (Christians) do not believe that God is a sort of ether, like the Force in Star Wars, that contains or flows through everything.
2. Christianity teaches that God is not a material being, so you're correct in saying that God is not "inside, or in any location", because this would be category error, analogous to "what does the color yellow taste like?". Nevertheless, God is "external" to me in the ontological sense: "I am not (a part of) God". This is analogous to saying "my love for fast cars is 'outside' my love for ice cream". If this and (1) were not the case, absurdities would result, like tall people having more God in them than short people.
Given the above, I think projo is correct. My self-esteem is grounded in knowing that God -- a maximally great being -- created me, and loves me enough to submit himself to poverty, hunger, humiliation, and crucifixion on a Roman cross to fix what I broke. To those who "get it", this produces love, humility, and a sense of self-worth.