Luk 22:44 And being in agony, He prayed more earnestly. Then His sweat became like great drops of blood falling down to the ground.
Prayers can be so normalized that it lacks effectiveness, fervency, intensity, wrestling etc. The best image I can master of intensity in prayer is that of Jesus in the garden of Gethsemane. The verse paints a picture of His intensity in prayers.
Now prayers does not change the purposes of God, but could change the direction or means to that purpose, I am convinced of that. There must be faith in the person praying and one being prayed for. In time of sickness, it is not the cold and formal prayer that is effectual, but the fervent prayer of faith. President Ronald Reagan once said, “when you can’t make them see the light, make them feel the heat” This quote goes so well with what prayer does. The ”word” is the light, “prayer” is the heat. The word fuels prayers, and prayers melts and solidifies the word in the heart to believe by faith. It holds on to God’s promises and speaks with confidence. When was the last time you prayed with intensity, with such urgency for the lost, the sick, young people, marriages etc that by the time you were done, time had gone, you were exhausted, and you felt like you had emptied the entire tank unto the Lord? That is what we are missing in our times and that is what we desperately need.