This sentence comes from Ba Jin, which means that if you leave the motherland, you will be absent-minded and miss the motherland all day.
Extended data
Creative background:
The core of Ba Jin's literary thought is truth, goodness and beauty. Between these two points, "truth" is the life and core of Ba Jin's literary thought, and "goodness" is the basic point and value of Ba Jin's literary thought. The goodness in Ba Jin's literary thought is the value pursued by man's absolute freedom, which mainly benefits from his early contact with anarchism.
Anarchism advocates the self-help relationship between individuals and pays attention to individual freedom and equality. Ba Jin's first novel "Death" expressed his hatred against autocracy and his love for mankind with great youthful passion, while his later novel "Home" more directly reflected his ruthless criticism of feudalism that restricted personal freedom.