Diligence is a means to make up for dullness.
Mastery of work comes from diligence.
I am a middle school student. In the eyes of teachers, I am a diligent child, and in the eyes of teachers, I am a diligent student. When other students are resting in the courseware, I still carefully arrange my notes in my seat and calculate the exercises over and over again; The other students have fallen asleep, and I'm still previewing.