When asking myself “who or what is God?”
I typically think of Creator, giver of life, forgiver if sins, etc.
Those seem like actions though, rather than descriptions.
I could go deeper and say that those actions are based on what God is, which is love, truth, beauty, etc themselves. Since you can’t say “I love you” and stay static, then love must be an act. Yet still, “act” seems vague sometimes, maybe even distant.
So, sometimes I go more intimate and ask not just who God is, but who God is to me - what relationship do I have with the act of love itself?
For me, God is the eternal lover of my soul, the one who made me who I am meant to be, the molder of my heart, my refuge from the darkness in this world, an eternal friend. I experience these relationships with God through three persons He revealed Himself to be - the Father, Son, and Holy Spirit, which all share a unique relationship with each other, and draw me to be part of it through the Eucharist.