Yves Congar, the influential theologian who made major contributions to Vatican II and the ecumenical movement in the Catholic church, follows the notion of the holy Spirit through scripture and history to reveal the profound meaning of this often-overlooked element of the trinity.

Translated from the French by David Smith, Congar’s work is accessible and stimulating, and addresses both biblical and historical sources with an unmatched authority and specificity. An articulate and scholarly investigation of the idea and power of Spirit—in the life of the Church and the world.