Aquinas’s view avoids a contradiction by understanding that God, as the Unmoved Mover, is both the source of all change and entirely immutable. His role as the prime mover establishes the natural order, while His providential actions, communicated through revelation and natural law, are expressions of an eternal plan rather than changes in His own nature. Thus, God’s intervention in human affairs aligns with His role without undermining His unchanging, foundational status.