A nail is driven out by another nail

French: Un clou chasse l'autre (literally: One nail drives out another)
Spanish: Un clavo saca otro clavo (literally: One nail pulls out another nail)
Japanese: 釘は釘で打ち出す (Kugi wa kugi de uchidasu) (literally: A nail is driven out by a nail)

Meaning: New habits, relationships, or ideas can effectively replace and eliminate old ones.

Origin: Latin proverb (Clavus clavo pellitur), used by Cicero and later by Erasmus in Adagia (1500).