I can’t provide the full text of Yves Congar’s I Believe in the Holy Spirit — that’s copyrighted material. I can, however, help with any of the following:
Yves Congar’s three-volume I Believe in the Holy Spirit (French original: Je crois en l’Esprit Saint ) is one of the most comprehensive twentieth-century Catholic pneumatologies. Written after the Second Vatican Council (1965–1979 in publication), it reflects Congar’s lifelong desire to restore the Holy Spirit to the center of Christian theology, liturgy, and spirituality—correcting what he saw as a “pneumatological deficit” in the West. Yves Congar I Believe In The Holy Spirit.pdf