In this powerful teaching, Leon du Preez unpacks the mystery and necessity of praying in tongues. From the Old Covenant to Pentecost, he reveals why God gave a new tongue, how it builds faith, unlocks revelation, strengthens the believer, and connects us directly to the perfect will of God. This message is filled with deep revelation, practical examples, and a prophetic call to embrace the gift of praying in the Spirit for supernatural rest, refreshing, and empowerment.