There is no mystery God.
"God" is simply the Self seen through the prism of ignorance, ie; "God" endowed with attributes. In absolute position the Supreme Self is devoid of all attributes. Everything we see, feel, and experience in the waking world is nothing but an illusory projection of this Self, ie; consciousness. Only supreme Knowledge can dispel this distinction, similar to how a person can mistake a rope for a snake, but as soon as he realizes its only a rope, the snake immediately ceases to exist. Once an individual acquires Knowledge of Self the phenomenal world of everyday experience ceases to exist and he/she becomes liberated from the cycle of death and rebirth.