Such a signature is often a feeling that only people who have experienced life and death can send out.

For example, a car accident pulled people back from death. When he opens his eyes again and sees his relatives and friends, he will be moved from his heart and finally come back. His heart will also say with emotion: "Fortunately, I am still alive." .

Another example is having a serious illness. After my illness, I have a deeper understanding of life. When I can live to see the sun rise, flowers bloom and birds sing ... he will be very happy and say from the heart, "I wish I were alive."