Ira Martin preaches about the necessity of genuine revival in the church, emphasizing the need for prayer, Spirit-filled preaching, denouncing of sin, and awakening the lukewarm and cold-hearted individuals. He highlights the signs indicating the need for revival, such as spiritual dormancy, embracing worldly influences, and committing spiritual adultery. Martin explains that true revival uncovers sin, leads to confession and repentance, and exposes false security in church membership without genuine rebirth.