Thus says the Lord, the King of Israel and his Redeemer, the Lord of hosts: “I am the first and I am the last, and there is no God besides Me. Who is like Me? Let him proclaim and declare it; yes, let him recount it to Me in order, from the time that I established the ancient nation. And let them declare to them the things that are coming and the events that are going to take place.” – Isaiah 44:6-7
There are no other beings like God. He is entirely unique. People who try to equate themselves with deity are practicing idolatry. God establishes His uniqueness in so many ways. “‘You are my witnesses,’ declares the Lord, ‘and My servant whom I have chosen, so that you may know and believe Me and understand that I am He. Before Me there was no God formed, and there will be none after Me’” (Isaiah 43:10).
When God placed the tree of the knowledge of good and evil in the Garden and placed a limitation on the man He had created, He was demonstrating that He is God, the Creator, and that Adam was man, the created. He laid down a clearly marked line that Adam and Eve were not to cross.
“I am the Lord, and there is no other; besides Me there is no God” (Isaiah 45:5). Satan, in the Garden of Eden, held out to Adam and Eve the idea that they could cross the line and become like God.
There is only one God. Worship Him and Him only.