The prayer of the feeblest saint on earth who lives in the Spirit and keeps right with God is a terror to Satan.  The very powers of darkness are paralyzed by prayer…no wonder Satan tries to keep our minds fussy in active work till we cannot think in prayer. 
 – Oswald Chambers

If we do not abide in prayer, we will abide in temptation.
– John Owen

Our prayer life is an indicator of our spiritual appetite.
– James W. Beeke and Joel R. Beeke

Do you understand that the success of your minister and missionaries is intimately bound up with your prayers?
– Joel R. Beeke

True prayer is the believer’s greatest weapon in the armory of God.  
– James W. Beeke and Joel R. Beeke