a rolling stone gathers no moss
Proverb meaning that a person who frequently changes jobs or locations does not accumulate wealth, status, or responsibilities, but also avoids stagnation. The interpretation can be positive or negative depending on context.
They say a rolling stone gathers no moss, but he succeeded by changing jobs repeatedly.
Japanese rendering of the English proverb 'a rolling stone gathers no moss', using classical Japanese grammar (生ぜず is the negative form of 生ず).