" The precious promises of our great God are distinctly intended to be taken to Him and exchanged for the blessings which they guarantee. Prayer takes the promise to the Bank of Faith and obtains the golden blessing. Take care how you pray. Make real business of it. Let it never be a dead formality. Some people pray a long time, but do not get what they are supposed to ask for because they do not plead the promise in a truthful, businesslike way. If you were to go into a bank and stand for an hour talking to the clerk, and then come out again without your cash, what would be the good of it? If I go to a bank, I pass my check across the counter, take my money, and go about my business. That is the best way of praying. Ask for what you need according to His will, because the Lord has promised it. Believe that you have the blessing, and go out to your work in full assurance of it. Get up from your knees singing because the promise is fulfilled. Then your prayer will be answered. It is not the length of your prayer, but the strength of your prayer that wins with God; and the strength of prayer lies in your faith in the promise which you have pleaded before the Lord. "
― Charles Haddon Spurgeon , God's Promises (Annotated): Of Salvation, Life, and Eternity