How do we know God's purpose cannot be thwarted?

God's sovereignty is a foundational aspect of Reformed theology, as seen in Scripture throughout both the Old and New Testaments. Romans 8:28 asserts that 'all things work together for good to them that love God, to them who are the called according to his purpose.' This illustrates that no matter the circumstances we face, God's plan is ultimately for our good and His glory. Our human choices, while real, do not frustrate God's divine design, highlighting the harmony between His sovereignty and human responsibility.