Romans 8:26-27 (KJV)
“Likewise the Spirit also helpeth our infirminities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be
uttered. And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.”

From the book, “Moments with His Majesty”
“One of the biggest lies ever perpetrated upon the body of Christ, and accepted as absolute fact by many believers, is the far-to-frequent quoted statement, “ALL WE CAN DO IS PRAY.” Personally, I believe that statement is a devious lie initiated by the forces of evil. It implies that ONLY after you have tried everything else, ONLY after you have utilized every tool under YOUR control, then and only then do you prayerfully submit your case to the Almighty as an absolute last resort. It essentially declares, Everything else has failed. I have exhausted all of my own resource and ideas, so now the only thing left to do is pray. The first thing we can and should do daily in our lives is pray and take spiritual dominion over every circumstances!”

John Wesley
“God does nothing except in response to believing prayer.”

Bishop Fulton J. Sheen (Moments with His Majesty)
“Satan has effectively disarmed believers because he keeps them too busy to pray. He loves to see them up to their eyes in ‘good works,’ provided these keep them from prayer. He laughs at their labors; He scoffs at their wisdom, but—Satan trembles when he sees, The weakest believer on his knees.”

Mother Teresa
“In the silence of heart God speaks. It you face God in prayer and silence, God will speak to you, then you will know that you are nothing. It is only when you realize your nothingness, your emptiness, that God can fill you with Himself.”

E.M. Bounds
“All other activities produce only what man can do, but the only restrictions to prayer are the limits of God. As far as God goes, prayer can go. Prayer is therefore as omnipresent as God. The men who have done the most for God in this world have been early on their knees. He who fritters away the early morning, its opportunity and freshness, in other pursuits than seeking God will make poor headway seeking Him the rest of the day. If God is not first in our thoughts and efforts in the morning, He will be in the last place the remainder of the day.”

Martin Luther
“If I fail to spend two hours in prayer each morning, the devil gets the victory through the day. I have so much business, I cannot get on without spending three hours daily in prayer.”