Book of 2 Corinthians Summary: Strength in Weakness. 2 Corinthians is one of Paul’s most personal and emotional letters. Unlike Romans, which reads like a theological essay, this letter reveals Paul’s heart: his pain, his defense of his ministry, and his encouragement to a church that doubted him. It is a book of paradoxes — boasting in weakness, strength through suffering, and God’s power displayed in fragile vessels.