Charles Spurgeon wrote in His book, The Power of Prayer in a Believer’s Life,
My own soul’s conviction is that prayer is the grandest power in the entire universe. It has more omnipotent force than any other force known to mankind. Prayer has as true, as real, as invaluable an influence over the entire universe as any of the laws of matter…Every prayer that is inspired of the Holy Ghost in your soul is as omnipotent and as eternal as that decree which said, “Let there be light: and there was light”(Genesis 1:3).
THE SOURCE OF PRAYER POWER
The source of power in prayer is the Holy Spirit. Without His help our prayers are weak and meaningless. But as we draw near to Him and wait on Him to lead us in prayer, we find that He not only shows us God’s heart, but He allows us to express His heart in our prayers. And so, as we pray, we find, to our surprise, that our words of prayer are words created by Him, words that please Him and follow after His will, words full of meaning, power, and glory.
We know also that the power of the Holy Spirit is manifested not only in our words of prayer, as we pray, but also in the results of our prayers, evident in every area of our Christian life. For when we prayed to receive Christ, God gave us the power to become His children (Jn. 1:12). By the same power, as we surrender to God in prayer, we are made more like Christ (Rom. 12:1-2). By His power, through prayer, we are given new boldness to witness (Acts 1:8, 4:31). By His power, as we continue in prayer, we are made victorious in the world (1 Jn. 2:15-17), against the flesh (Gal. 5:16-17), and over Satan (1 Pet. 5:7-9). By His power, through prayer, we are made able to resist temptation to sin (1 Cor. 10:13, Rom. 6:1-16). By His power, through prayer, we are strengthened in the inner man, so that Christ may dwell in our heart through faith. And by the same power, through prayer, we are rooted ad grounded in love, being able to comprehend the great love of Christ, and are filled wit the fullness of God (Eph. 3:16-19). By the power of the Holy Spirit, as we continue praying in the Spirit, we are made able to do anything that God wants us to do (Eph. 3:20, Phil. 4:13).