Compara traducciones versículo por versículo
De entre nosotros han salido, mas no eran de los nuestros, pues si de los nuestros fueran, habrían permanecido con nosotros. Pero es para que se vea claro que no todos son de los nuestros.
Salieron de nosotros, mas no eran de nosotros; porque si fueran de nosotros, hubieran cierto permanecido con nosotros; pero salieron para que se manifestase que todos no son de nosotros.
They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.
They went out from us, but they didn’t belong to us; for if they had belonged to us, they would have continued with us. But they left, that they might be revealed that none of them belong to us.