CCC 271
© Libreria Editrice Vaticana Source: vatican.va
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." St. Thomas Aquinas, STh I, 25, 5, ad I.
Read the full chapter 1. I Believe in God the Father ¶198–421