The author argues that the simplicity of the New Testament has often been misinterpreted over time, transforming its revolutionary meaning into mere 'sweet reasonableness' in the eyes of the public. As the title suggests, the book is divided into two main theological foundations inherited from the Old Testament but completely reconfigured in the New Testament: (a) The Power: God's power based not on worldly domination, but on the transformative power of the redemption and resurrection of Jesus Christ; and (b) The Wisdom: Divine wisdom that often appears foolish in the eyes of human logic, but which breaks with the wisdom of the world through the cross and teachings of Christ. The content also reflects the important transition in the Catholic Church during the Second Vatican Council, where the shift from Latin to vernacular worship prompted a profound reinterpretation of the sacred texts. He sees his task as a careful explanation of the New Testament text, inviting both academic and general readers to see firsthand what the original authors were really trying to convey. This book is suitable for readers studying theology or those who want to re-examine the meaning of the New Testament beyond the confines of popular religion.