Why does time sometimes seem to fly by, while in other situations it feels like it stands still? What influences our experience of time, and how do the different perspectives of philosophy, psychology, biology, or theology explain this? What happens when we become ill? How does a mental illness alter our perception of time, and how does a progressing tumor disease affect it? What does it mean for our experience when we know that we have little time left? This volume addresses these important questions from both practical and theoretical viewpoints.