The first sentence "looking up to the sky and doing nothing" means that in the face of the hardships of life, you can't find a job or a stable income, but you can only sigh helplessly and do nothing.
The second sentence, "Know that eating is not easy", is about knowing that it is not easy to make a living, working hard for life and running around.
The third sentence "muddling along, meaningless" reflects a kind of helplessness and confusion, because life is hard, we can only muddle along, unable to pursue higher-level needs, and feel that life is meaningless.
The last sentence, "I hate being late when I am hungry", tells the pain of struggling in hunger and poverty. Only after experiencing hunger and hardship can you deeply appreciate the importance of food and warmth.
The whole article expresses a person's struggle and helplessness on the poverty line and has a deep understanding and experience of the hardships and pains of life.