The concept of human renewal, particularly through the lens of faith, is a profound and perennial theme in Catholic thought. Rooted in the teachings of Jesus Christ and developed through centuries of theological reflection, this idea speaks to the transformative power of grace, prayer, and virtue in the life of the believer. To understand the renewal of man, one must first grasp the foundational principles that underpin Catholic doctrine on the nature of humanity, sin, salvation, and the means by which God seeks to restore His creation.