Prayer was a way of life for Adrienne von Speyr, one of this last century's great Catholic mystics. In this major work on prayer, edited by Hans Urs von Balthasar, Adrienne discusses the many aspects and kinds of prayer, the vocation of every Christian.The fundamental theme of this work is that prayer, like everything else that comes to man through God's self-revelation in Christ (such as grace; faith, hope and love; or the realationship between Christ and the Church), is ultimately rooted in God himself and in his triune exchange of life.