"... The effective, fervent prayer of a righteous man avails much. Elijah was a man with a nature like ours, and he prayed earnestly that it would not rain; and it did not rain on the land for three years and six months. And he prayed again, and the heaven gave rain, and the earth produced its fruit." (James 5:16-18)

"So Jesus answered and said to them, “Have faith in God. For assuredly, I say to you, whoever says to this mountain, ‘Be removed and be cast into the sea,’ and does not doubt in his heart, but believes that those things he says will be done, he will have whatever he says. Therefore I say to you, whatever things you ask when you pray, believe that you receive them, and you will have them." (Mark 11:22-24)

There are exceeding great and precious promises to those who pray. What did the Lord Jesus mean when he spoke such words as these: "Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you: for every one that asketh, receiveth; and he that seeketh, findeth; and to him that knocketh, it shall be opened" (Matt. 7:7, 8). "All things whatsoever ye shall ask in prayer believing, ye shall receive" (Matt. 21:22). "Whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son. If ye shall ask anything in my name, I will do it" (John 14:13, 14). What did the Lord mean when he spoke the parables of the friend 'at midnight and the importunate widow (Luke 11:5; 18:1)? Think over these passages. If this is not encouragement to pray, words have no meaning.

There are wonderful examples in Scripture of the power of prayer. Nothing seems to be too great, too hard, or too difficult for prayer to do. It has obtained things that seemed impossible and out of reach. It has won victories over fire, air, earth, and water. Prayer opened the Red Sea. Prayer brought water from the rock and bread from heaven. Prayer made the sun stand still. Prayer brought fire from the sky on Elijah's sacrifice. Prayer turned the counsel of Ahithophel into foolishness. Prayer overthrew the army of Sennacherib. Well might Mary Queen of Scots say, "I fear John Knox's prayers more than an army of ten thousand men." Prayer has healed the sick. Prayer has raised the dead. Prayer has procured the conversion of souls. "The child of many prayers," said an old Christian to Augustine's mother, "shall never perish." Prayer, pains, and faith can do anything. Nothing seems impossible when a man has the spirit of adoption. "Let me alone," is the remarkable saying of God to Moses when Moses was about to intercede for the children of Israel - the Chaldee version has, "Leave off praying" - (Exod. 32:10). So long as Abraham asked mercy for Sodom, the Lord went on giving. He never ceased to give till Abraham ceased to pray. Think of this. Is not this encouragement? - J.C. Ryle