Karl Rahner

"The Christian of the future will be a mystic or he will not exist at all."

"How often I have found that we grow to maturity not by doing what we like, but by doing what we should. How true it is that not every 'should' is a compulsion, and not every 'like' is a high morality and true freedom."

"Every year we celebrate the holy season of Advent, O God. Every year we pray those beautiful prayers of longing and waiting, and sing those lovely songs of hope and promise."

"The number one cause of atheism is Christians. Those who proclaim Him with their mouths and deny Him with their actions is what an unbelieving world finds unbelievable."

"The task of the theologian is to explain everything through God, and to explain God as unexplainable."

"In the days ahead, you will either be a mystic (one who has experienced God for real) or nothing at all."

"For it is the bitter grief of theology and its blessed task, too, always to have to seek (because it does not clearly have present to it at the time)...always providing that one has the courage to ask questions, to be dissatisfied, to think with the mind and heart one ACTUALLY has, and not with the mind and heart one is SUPPOSED TO have."