The Bible is primarily a book about God. Verse by verse, chapter by chapter, book by book, the Bible is the story of how God has progressively revealed Himself to man, with its ultimate revelation found in Jesus Christ.
When Jacob returned to the place called Bethel, where God had first appeared to him, God once again appeared. This time the Lord revealed more about His own character by revealing one of His names, “El-Shaddai,” which means “God Almighty.” God wanted Jacob to know that His promises were sure because His power was complete. He is the omnipotent One, the all-powerful One, El-Shaddai, God Almighty. What God promises, He is more than able to do.