his/her success
I am sure of his success.
Su éxito fue nada menos que un milagro.
His success was nothing short of a miracle.
I’m sure of his success.
Nosotros creemos que el motivo de su éxito fué el trabajo duro.
We believe that the reason for their success was hard work.
Su éxito no se debe tanto al talento como al esfuerzo.
His success is due less to talent than to effort.
Cuando me enteré de su éxito, le escribí una carta.
When I learned of his success, I wrote him a letter.
We congratulate you on your success.
Permítame felicitarla por su éxito.
Allow me to congratulate you on your success.