The core of Karl Rahner’s theology describes something that I have personally experienced. It is a transcendental experience of an Infinite Silence in the midst of everyday life. I call this Infinite Silence God, and it is the reason why I wrote this book. I wanted to tell readers about Karl Rahner’s theology because he says that we all have this transcendental experience, even if we are unaware of it. Karl Rahner refers to it as an “infinite horizon” in the background of all our experience. It is a “holy mystery” because it seeks to fulfill our spiritual destiny and cannot be contained by any category. This book is a simple and concise restatement of Karl Rahner’s most systematic work, Foundations of Christian Faith. Rahner’s complex academic writing is rendered into readable prose so that readers will be comfortable with his remarkable theology. Once we get passed Karl Rahner’s complex academic style, what we end up with is the story of who we are, and the adventure of who we can become. As Rahner says, the future is an open possibility.