How do we know that God's word will not return void?

The promise in Isaiah 55:11, where God declares, 'So shall my word be that goes forth from my mouth; it shall not return to me void, but it shall accomplish that which I please,' assures us of the efficacy of His word. This statement underlines that God's purposes will always be fulfilled according to His divine plan. Unlike human words that may fail or be ineffective, God's word is infused with power, carrying out His intended purposes. This conviction encourages believers to rely on the truth of Scripture, trusting that it will lead to spiritual growth and transformation.