Fang knows why he cried when he was alive. What was the last sentence?

When I first came here, I didn't know how to suffer.

These two poems express the impermanence and suffering of life and people's thinking and confusion about life. "I'm new here, I don't know the pain" means I'm new here and I don't know the pain and hardship of this world. This sentence implies that people have not really realized and understood the hardships and challenges in life when they first started living. "You know why you cry when you are alive" is a response to the previous sentence. When people go through a period of life and look back, they will understand why they cried when they were born. Expressing thinking and reflection on life means that people will cherish and think more about the meaning of life when facing the hardships and uncertainties of life.