Exodus 6:2-4 ESV
2 God spoke to Moses and said to him, “I am the Lord. 3 I appeared to Abraham, to Isaac, and to Jacob, as God Almighty, but by my name the Lord I did not make myself known to them. 4 I also established my covenant with them to give them the land of Canaan, the land in which they lived as sojourners.
God reveals Himself in a new way. He did this and will do this again through His Son Jesus, our Lord. The earth eagerly awaits the revealing of His children.