Yes indeed besides God there is no other. God rules and reigns supreme over all, besides Him there is no other.
There are other entities that act as if they are God, their actions in themselves does not make them God.
God is almighty and all powerful. He has the final say over every principality, wicked spiritual forces in the heavenly world, the rulers and authorities of this Dark Age which seeks to run a parallel government to that of God.
Jesus Christ is the link though which we are save from these forces that tends to obsess us with the tings of this world; they oppress and possess humanity but Jesus Christ remains our main stay. Jesus Christ came that we may have life and have it abundantly.
Whatever spirit or person that says anything is of God, test it first before committing to it. Be sure it is for God first. Ask God to confirm it if is of God.
Experience Life Abundance In Christ