Praying in tongues means your spirit unites with the Holy Spirit, who prays through you with what the speaker calls "perfected prayers." When you do this, you align with the Spirit's power and will, receiving spiritual benefits from prayers you can't fully express in words.
You are one with the Holy Spirit in your spirit. The Holy Spirit prays for you. When you pray in tongues, your spirit is praying. Therefore, when you pray in tongues, the Holy Spirit is praying for you through you. The Holy Spirit prays for you with groanings that cannot be expressed in words. He prays with passion. He prays with perfected prayers. So when you pray in tongues and you pray from the Spirit, you are praying those perfected prayers. This is why there are great benefits to praying in tongues, because those perfected prayers are coming through you. You're coming into agreement with the Holy Spirit. You're praying with his guidance, by his power, in his authority, according to his will. That's what it means to exercise this beautiful gift of speaking in tongues.
