In Catholic theology, holiness isn't merely outward piety but an inner spiritual transformation. It's a lifelong journey, a path to holiness fueled by divine grace. This grace, a free gift from God, empowers individuals to cooperate with God's will, leading to profound moral transformation. The path involves actively engaging in prayer, receiving the sacraments, and striving to live a virtuous life. Spiritual growth manifests as increased love for God and neighbor, a deeper understanding of God's word, and a consistent effort to live according to His teachings. This continuous striving, guided by the Holy Spirit, is the essence of holiness in Catholic belief.