A grain of dust in the world falls on an individual's head like a mountain. What do you mean?

This sentence comes from China ancient poet Li Bai's poem "Into the Wine". This means that sometimes we worry and worry too much because of trivial things, and even take these things more seriously than what is actually important. Just like a small dust falling on our heads, it is as unbearable as a mountain, because we pay too much attention to details and ignore the importance of the whole. So the meaning of this sentence is to remind us not to stick to the details too much, to grasp the overall situation and face the challenges in life with a more peaceful attitude.