記得是在一個影片裡看到的臺詞，人的一生包括三次死亡：第一次是停止呼吸、停止心跳，你被醫生宣佈生物學上的死亡；第二次是當你下葬，親朋好友來參加你的葬禮，他們宣告你在這個社會上不再存在，你從他們的人際關係網裡消失；第三次是當這個世界上最後一個記得你的人，把你悄然忘去，這個時候你將真正的死去，整個宇宙都跟你沒有半點關係。
每個人都害怕真正的死亡，每個人都害怕被這個世界遺忘，因此一些人就對於死亡後的情形有著美好的期望，這樣各種宗教神學就出現了。它們描繪了死後的世界，在這樣的世界裡讓大家不那麼懼怕死亡了。說實話一種自欺欺人罷了，再說了生物體的消亡是客觀存在的事實，每個生物體都不能避免的。
我們身體的基本組成就是一些各種功能的細胞，它們吸收糖分等營養物質進行有氧呼吸，產生生物能供我們日常運動，就像是一臺機器永久了自然會有損傷，當然細胞更好的一點是它可以分裂，及時補充死亡的細胞。但是對於人體而言，這個分裂的次數是有限制的，跟細胞內染色體上的端粒有關，因為每次分端粒就會變短，可想而知終歸是有無法分裂的那一天。
好多人認為人死亡後意識可能會單獨留存下來，可能會去一個新的世界，例如高維空間等。但這些都只是美好的願望，沒有任何科學依據可言。人死了就徹底的消失了，至於有沒有人記得我們，或者是能記多久這些還有意義嗎？活在當下，珍惜每一分每一秒鐘，即使有離去的那一天你應該是笑著離開的，因為這一生很值得！但成年人的世界真的很難，為父母、為孩子奔波、奔波、奔波…，待閒下來抬頭一看已然即將到達終點，但回頭一看就是自己的子女家庭，這也是一生中的財富了！
人生路上路阻且長多珍惜，一路風景錯過就不再了！
I remember the lines I saw in a movie. A person's life includes three deaths: the first is to stop breathing and heart beating, and you are declared to be biologically dead by doctors; the second is when you are buried, and your relatives and friends come to attend your funeral, and they declare that you no longer exist in this society, and you disappear from their interpersonal network; the third is when the world's most beautiful people are dead The last one who remembers you will forget you quietly. At this time, you will really die. The whole universe has nothing to do with you.
Everyone is afraid of real death, and everyone is afraid of being forgotten by the world. Therefore, some people have good expectations for the situation after death, so various religious theologies appear. They depict the world after death, in which people are less afraid of death. To tell you the truth, it's just self deception. Besides, the extinction of organisms is an objective fact, and every organism can't avoid it.
The basic composition of our body is a variety of functional cells. They absorb sugar and other nutrients for aerobic respiration, and produce biological energy for our daily exercise. It's like a machine. Once it's permanent, it will be damaged naturally. Of course, the better part of cells is that they can divide and replenish dead cells in time. But for the human body, the number of divisions is limited, which is related to the telomeres on the chromosome in the cell, because every time the telomeres are divided, they will become shorter. It can be imagined that there will be a day when they can not divide.