The Efficacy of God's Word

Isaiah 55:10-11

For as the rain comes down and the snow from the sky, and doesn’t return there, but waters the earth, and makes it grow and bud, and gives seed to the sower and bread to the eater;

so shall my word be that goes out of my mouth: it shall not return to me void, but it shall accomplish that which I please, and it shall prosper in the thing I sent it to do.