3:14 I AM. This distinctive name of God identifies Him as the one who is eternally self-existent. All created entities had a beginning, including even time itself (Genesis 1:1). As creatures, we must reckon in terms of the past and future, but to the Creator of time, all is present. He is transcendent to time as well as space. The centuries that had passed since the promises had been made to “the fathers” had not caused God to forget them, for they were still as new as ever to Him.
3:15 God of your fathers. Jesus Christ referred to this claim (especially as made in Exodus 3:6) as proof of life beyond the grave (Matthew 22:32). The “fathers” were still living, since God was still their God. If God is eternal, so are those whom He has created (Ecclesiastes 3:14).