"My word shall not return to me void, but shall do my will, achieving the end for which I sent it." (Isaiah 55: 11).
What makes the word of God so potent, so incredibly powerful? We can gain some understanding by asking: What makes the Name of Jesus so powerful? First the Name Jesus means GOD SAVES. The Name of Jesus accomplishes what it signifies and It signifies what It accomplishes. The Name Jesus is the power of Jesus, the person of Jesus and the presence of Jesus.
So is the word of God. It is the power of God. God is in His word. Therefore, it never fails!
"But the seed sown on rich soil is the one who hears the word and understands it, who indeed bears fruit and yields a hundred or sixty or thirtyfold.” (Matthew 13: 23).
"Therefore, put away all filth and evil excess and humbly welcome the word that has been planted in you and is able to save your souls." (James 1: 21).