Which poem of Gong Zizhen is often used to describe the profound influence of teachers on students' obscure cultivation?

I quit my job and go home, just like a flower falling from a branch, but this is not a heartless thing. It can be turned into the soil of spring and can also play a role in nurturing the next generation.

Poetry describing the teacher's influence on students' hazy cultivation.

I quit my job and went home, just like a flower falling from a branch, but it was not a heartless thing. It has become the soil of spring and can also play a role in cultivating the next generation.