For a long time, people have been terrified of cancer, believing it to be incurable and that anyone diagnosed with it has little time left to live. A cancer diagnosis can leave people in constant fear and anxiety. But there is no need to panic. Cancer ranks only second among causes of death in our country. Cardiovascular disease is the biggest threat to our health. Cancer is now managed as a chronic disease, at the same level as hypertension, diabetes, and obesity. Through various media, we hear of people who were diagnosed with cancer and received no treatment, yet recovered simply by changing their lifestyle. Of course, those are isolated cases. This is not meant to encourage anyone with cancer to forgo treatment. Rather, we should take it lightly in our overall strategy while treating it seriously in our tactics: cooperate actively with treatment and adjust our mindset. Cancer is nothing to fear. Know yourself and your enemy, and you will win every battle. Let's learn about tumors together. Once we understand how tumors develop, can interpret tumor reports, know what steps to take, and resolve the questions troubling us, we can take precautions before problems arise, face tumors with a smile, and learn to live alongside them without being terrified of cancer.