As long as humans are born helpless, there will be a hand to feed them, clean them, and guide them. is not a metaphor about the past; it is a prediction about the future.

La mano que mece la cuna " (en inglés, The Hand That Rocks the Cradle ) es un título cargado de significado que abarca desde una famosa película de suspenso hasta un proverbio clásico sobre el poder de la influencia. 1. La Película Clásica (1992)

In the 1992 film, the villainous nanny uses the cradle as a weapon. She isn't raising the child; she is using the child to destroy the mother. Thus, la mano que mece la cuna becomes a metaphor for