Historically, the gospel has been lost and obscured by tradition, politics, superstition, etc. The Reformation that began in 16th century was the momentous rediscovery of the gospel. The 5 Solas accurately present the gospel in a unified way. In the first session, we will study the formal principle of the reformation, namely Sola Scriptura. Under the slogan, we believe that the Bible is the sole and infallible foundation for Christian faith and practice. In other words, we can only identify a teaching or a practice as distinctively Christian if it flows from the Bible itself as the word of God.