A guide outlining the key messages of the Apostle Paul's letters. This book examines how Paul brought the 'Good News' (the Gospel) to address various issues within the ancient Corinthian church. It is divided into two sections: 1 Corinthians (addressing division and morality) and 2 Corinthians (defending his apostleship and finding strength in weakness). The section on 1 Corinthians focuses on Paul's response to the division, moral crises, and theological confusion among the Corinthians. The section on 2 Corinthians is more personal in tone, as Paul defends his apostleship and ministry against accusations from false teachers. Ultimately, these two letters demonstrate that the Gospel is not merely a theological theory, but the power of God—restoring fellowship, purifying moral life, and empowering believers amidst the suffering and weaknesses of the world.