The late Kenneth E. Hagin, a leading prophet and teacher in his day, said the reason we are not seeing the dynamic power of God in greater manifestation today is because “we don’t pray in tongues long enough.”
Recent history records that an angel took John G. Lake, that great apostle to South Africa in the last century through the book of Acts with this most compelling exhortation:
“This is Pentecost as God gave it through the heart of Jesus. STRIVE FOR THIS. CONTEND FOR THIS. TEACH THE PEOPLE TO PRAY FOR THIS. For this, and this alone, will meet the necessity of the human heart, and this alone will have the power to overcome the forces of darkness." As the angel was departing, he said: PRAY. PRAY. PRAY. “Teach the people to pray. Prayer and prayer alone, much prayer, persistent prayer, is the door of entrance into the heart of God.”
“The effectual fervent prayer of a righteous man avails much.” (James 5:16b)
Here is another juicy translation of that verse:
“The earnest (heartfelt, continued) prayer of a righteous man makes tremendous power available [dynamic in its working].” (James 5:16b - AMPC)
Although in context this verse is in reference to healing, the same principle applies to intercession and supplication.
Paul asked the saints to pray this way — for God to open a door for the word.
“…meanwhile praying also for us, that God would open to us a door for the word, to speak the mystery of Christ, for which I am also in chains…”(Colossians 4:3)
This wide and effectual door for the word was opened in Acts 19. This door released two powerful streams of dynamic power.
1. The word had free course and moved swiftly. It watered that entire region of Asia Minor.
“And this continued for two years, so that all who dwelt in Asia heard the word of the Lord Jesus, both Jews and Greeks.” (v. 10)
2. Then the unusual miracles that flowed from the virtue that apparently Paul’s body was anointed with, bore testimony to the active power of God that was dynamic in its working, and it caused the word to grow mightily — from a gentle rain that saturated all of Asia Minor to torrential rains that caused the word of the Lord Jesus to grow mightily and prevail over all its adversaries.
“So the word of the Lord grew mightily and prevailed.” (v. 20)