Here are some quotes about the power of prayer:

- "We can change the course of events if we go to our knees in believing prayer." - Billy Graham
- "Prayer is the mortar that holds our house together." - Mother Teresa
- "We all need God's power in our lives, and prayer is the dynamic that releases His power, sometimes in dramatic ways." - Joyce Meyer
- "The power of prayer rests in the faith that God hears it." - Andrew Murray
- "Our prayers may be awkward. Our attempts may be feeble. But since the power of prayer is in the one who hears it and not in the one who says it, our prayers do make a difference." - Max Lucado
- "To be a Christian without prayer is no more possible than to be alive without breathing." - Martin Luther
- "Prayer is the way you defeat the devil, reach the lost, restore a backslider, strengthen the saints, send missionaries out, cure the sick, accomplish the impossible, and know the will of God." - David Jeremiah

I hope these quotes help you.