In English language

There is only one happiness: duty.
Carmen Sylva, translated by Andreea Florescu
The original in Romanian language
In German language
Es gibt nur ein einziges Glück: die Pflicht.
Carmen Sylva, translated by Monica Stinghe
In French language
Il n'y a qu'un bonheur: le devoir.
Carmen Sylva, translated by Alex Bodoli
In Spanish language
No existe más que una felicidad: el deber.
Carmen Sylva, translated by Monica Fernandez
In Italian language
C'è solo una felicità: il dovere
Carmen Sylva, translated by Eliza Biță