For thou art great, and doest wondrous things: thou art God alone. - Psalm 86:10
God alone. There is no other like Him. No one else can do what He can do. No one else can be all that He is. If I counted correctly, we've already covered thirty-seven titles of God in the book of Psalms. Thirty-seven words or phrases that describe Who God is and what He's capable of. Who else could even come close? Who else could be a King, a refuge, our strength, our hope, our buckler, our shield, our sun, our joy and so much more all at the same time? Is there anyone else who could fill such a role? Absolutely not! Only God.
Only God loves with unconditional love.
Only God rules right and just without being swayed by wayward emotions.
Only God sees all, hears all, knows all.
Only God loves us enough to send His Son to die for our sins.
Only God can be everything we need every time we need Him.
Only God can hear and answer every prayer.
Only God can create something from nothing.
Only God controls all things.
Only God has enough compassion to forgive us time and time again.
I could keep this up all day, but I think you get the point. Satan may try to imitate God, but he can't. There is only one God, and that one God is my God! He is truly indescribable, but that's not going to keep me from trying.
No other can take His place. No other can meet our needs, answer our prayers or comfort our hearts. We need God and God alone!