More than it will change any one or any thing, persistent prayer will change the one who prayers persistently.
The scripture is perfectly clear. If you don’t quit, you will reap a harvest. The seeds that you have sown will grow. Just don’t faint. Stand firm in faith. It is an irrefutable, immovable law of scripture: persistence in well doing produces the harvest of blessing. The laws of God’s Word are more certain than the physical laws under which our world operates.