Going back decades before I knew Christ, I read a book that says prayers work. I don't think the author was any fervent Christian; he just wrote what he had discovered. So I thought that must be something to prayers. Of course, now I know that Christ is real and is God, and he hears and knows everything we do. If we pray with all our heart, with all our soul, with all our mind, and with all our strength, you can be sure the Lord will open his heart wide to us and bless us or the world in some way. So with prayer we can influence and change God's heart, ultimately to benefit us and the whole world.