Omnipotence means that God is all powerful.
Caleb Colley, Ph.D. writes.
God is the only being Who possesses omnipotence. In the Oxford English Dictionary, “omnipotence” is defined as “all-powerfulness,” or “almightiness.” In other words, when God wants something to be done, it is done. God has all power in heaven and on Earth (Matthew 28:18), so unlike the limited power of humans, which is constrained by time, space, and force, God’s capabilities are limited only by His own character. Paul wrote of God’s omnipotence in the sense that He is “above all, and through all, and in you all,” (Ephesians 4:6). God is preeminent for many reasons, not the least of which is His great power.
God has complete power over the Earth. The very first chapter of the Bible (Genesis 1) is full of references to God’s power. The words of His mouth brought the Universe into existence; He spoke the Cosmos into existence with only a word (Colossians 1:16; Hebrews 11:3). In order to create the Universe, God needed no pre-existing matter with which to work; rather, He Himself spoke the very first matter into existence. After He created “the heavens and the Earth,” He spoke “light” into existence on Earth (Genesis 1:3). After creating light, He created the firmament, and much more, all by the power of His word.
God has complete power over the spiritual realm. Just as the first chapter in the Bible reveals that God created light on Earth, the last chapter in the Bible reminds us that God’s power will be responsible for the eternal light in heaven (Revelation 22:5). Christ repeatedly cast out devils during His earthly ministry (Matthew 8:16; 9:32-33; 12:22), and James revealed that the demons believe in the one God of the Bible, and that because they are aware of God’s omnipotence, they tremble (Luke 8:31; James 2:19). God now limits Satan himself, keeping him from directly inhabiting people or causing people physical pain (Zechariah 13:1-2).
Only God can perform “wonders,” and only God can furnish that capability to others (Job 5:9; Psalm 72:18; John 3:2). Christ again revealed His power over the spiritual realm when He brought Lazarus’ soul back from the realm of departed spirits, and returned it to Lazarus’ body (John 11:43). Similarly, God will resurrect all the dead one day, having already determined the fate of their souls (Mark 12:26-27; Romans 6:4; 1 Corinthians 15:15,32; 1 Thessalonians 4:15-17; 1 Peter 1:3-5).
God can do anything He pleases, at any time He pleases.
Tom Stearns, WASI Chaplain, 907 715-4001