What does the Bible say about the reign of God?

The reign of God is a central theme in Scripture, highlighting His sovereignty over every aspect of creation and humanity. In Mark 4:26-29, Jesus illustrates this reign through the parable of the growing seed, demonstrating that God oversees all spiritual growth and harvests. Furthermore, Revelation 19:6 declares, 'For the Lord God Omnipotent reigneth,' affirming His eternal rule. This sovereignty means that God has the ultimate authority over life and death, as seen in Romans 1:17-18, where Christ holds the keys of hell and death, ensuring that His good purposes are accomplished in the lives of His people.