How does the concept of increase relate to God's Kingdom?

The river Pison, interpreted as 'increase', signifies the relentless growth and expansion of God's Kingdom. This increase is rooted in the assurance of God’s certain and gracious governance over His people as noted in Isaiah 9:6-7, where the increase of His government shall have no end. Throughout scripture, God demonstrates a consistent pattern of growth within His covenantal promises, ensuring that His people are continuously nurtured and multiplied. This ensures that in Christ, there is both a foundation for hope and an expectation of spiritual fruitfulness, emphasizing God's active involvement in the salvation and sanctification of His elect.