The Buddha compared craving to a vine that, left untended, will grow back however many times it is cut, unless the root itself is found and removed
The Buddha's image for craving is agricultural rather than moral — it is not a sin to be punished but a weed that keeps returning until someone deals with the root.
The Dhammapada's twenty-fourth chapter, devoted to tanha (craving), compares uprooted craving that is not fully removed to a vine or creeper that grows back again and again, however many times its visible shoots are cut away. Verses 340 through 343 develop this image at length, describing craving spreading in all directions like a creeping plant and warning that a person who merely trims the surface of desire will simply watch it return. The teaching's practical implication is that behavior modification alone — resisting a particular temptation this one time — does not accomplish what finding and removing the underlying root does. For a celibate monastic specifically, this reframes ongoing struggle with desire not as personal failure but as expected: surface growth returns until the deeper craving driving it is actually seen and released, which is the slower, more demanding work the monastic life is structured to support.
Dhammapada