God’s self-designation of the “I am” is the only non-conditional reality that can ever be. Or, to phrase it another way, it is the only self-conditional statement that can ever be.
To explain: God cannot be unless he has always been. Existence cannot be unless God is. How is this so? Because everything else that is, is conditioned upon God being. For instance, the very language we use to describe such ideas are dependent upon the condition of God (who made language) being. Our own reality can only be understood with the condition that God is. Creation is conditioned and dependent upon a Creator. Love is conditioned on a Lover. God’s Grace is conditioned on the reality of sin (as well as the Sinner and the Grace-Giver) which is conditioned upon God’s Holiness which is conditioned on the essence of God’s character which is conditioned on God’s existence. If God is not the “I am”, then there is no such thing as holiness and thereby no standard with which to condition sin and thereby no sinner and thereby no Grace to save us from our sin. Scripture is conditioned by the reality of a God who reveals Himself and Truth itself is conditioned upon a God who defines it.
Because God is, reality itself is possible and in fact actual. God’s existence is because He is. He is because He exists. He is the un-conditioned Reality from which all reality is understood and known. He is not bound to any external understandings or realities. He defines what is, because He is. He is the un-influenced Influencer, the un-moved Mover, the non-Created Creator, and the non-conditioned Reality.