Of all the divine attributes, only God’s omnipotence is named in the Creed: to confess this power has great bearing on our lives. We believe that his might is universal, for God who created everything also rules everything and can do everything. God’s power is loving, for he is our Father, and mysterious, for only faith can discern it when it “is made perfect in weakness”. “He does whatever he pleases” The Holy Scriptures repeatedly confess the universal power of God. He is called the “Mighty One of Jacob”, the “LORD of hosts”, the “strong and mighty” one. If God is almighty “in heaven and on earth”, it is because he made them. Nothing is impossible with God, who disposes his works according to his will.
He is the Lord of the universe, whose order he established and which remains wholly subject to him and at his disposal. He is master of history, governing hearts and events in keeping with his will: “It is always in your power to show great strength, and who can withstand the strength of your arm? “You are merciful to all, for you can do all thing”
God is the Father Almighty, whose fatherhood and power shed light on one another: God reveals his fatherly omnipotence by the way he takes care of our needs; by the filial adoption that he gives us (“I will be a father to you, and you shall be my sons and daughters, says the Lord Almighty”): finally by his infinite mercy, for he displays his power at its height by freely forgiving sins. God’s almighty power is in no way arbitrary: “In God, power, essence, will, intellect, wisdom, and justice are all identical. Nothing therefore can be in God’s power which could not be in his just will or his wise intellect.”
From the Catechism of the Catholic Church 268-271