Still, you may at times feel troubled spiritually by a diagnosis of cancer. Many people feel angry and betrayed by God or the universe because they have not been spared of this misfortune. Others realize that they have never before had to probe a deeper meaning of their lives. Remember that your spiritual beliefs and outlook can change dramatically throughout life as you mature and experience new things. Also, remember that you are entitled to have doubts, to question God or the way you've understood God, even to be angry.
Most religious traditions have prayers of doubt and complaint.
Having doubts or distress doesn't mean that you are not a spiritual person. Take time regularly to meditate or pray. This can bring a sense of calm and stability during difficult times. Read spiritual writings such as the Bible, the Koran, or Bagavad Gita. Delving into sacred texts can put you in touch with ancient traditions of wisdom and give you a sense of connection with a more divine reality.