It emphasizes the Church as a “mystery,” a community of faith gathered by the Holy Spirit. One of its central themes is the “universal call to holiness”—the idea that all the baptized, not just clergy or religious, are called to live lives of holiness.
Sacrosanctum Concilium, promulgated in 1963, sought to deepen our participation in the mystery of Christ’s saving work by encouraging “full, conscious, and active participation” in the liturgy. The Council Fathers understood that the liturgy is the source and summit of Christian life, and they desired to make it more accessible so that all the faithful could engage more meaningfully in our worship.
At its core, Vatican II sought to renew the Church’s mission, opening her to engage more fully with the challenges and opportunities of the contemporary age. Rather than changing doctrine, the Council aimed to rediscover and re-present the timeless truths of the faith in ways that could speak more effectively to the people of the time.