Names of God and Their Meanings: If God’s Name Is Jehovah, Why Then Is He Called Jesus?

   Jehovah God tells us clearly in the Old Testament: “I, even I, am Jehovah; and beside me there is no savior” (Isaiah 43:11). “Jehovah … is my name for ever, and this is my memorial to all generations” (Exodus 3:15). And yet it says in the New Testament: “Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved” (Acts 4:12). “Jesus Christ the same yesterday, and to day, and for ever” (Hebrews 13:8). It says in the Old Testament that only Jehovah is God’s name and thus it shall be forever. In the New Testament, however, it says that one can only be saved by the name Jesus. Since God’s name Jehovah in the Age of Law was to be His name forever, why then was God called Jesus in the Age of Grace? How are we to understand the word “for ever” as mentioned here in the Bible? What truths and mysteries are hidden behind God’s names? Let’s fellowship about this now.

"God's Name Has Changed?!" (1) - Are God's Words All in the Bible? | The Church Almighty God

Are All of God's words in the Bible? Do God's words exist outside of the Bible?

Storyline:

Her name is Wang Hua, and she is a house church preacher in Southern China. After she began to believe in the Lord, she found in the Bible that God was called Jehovah in the Old Testament, and was called Jesus in the New Testament.