Taught that death on the battlefield in service to Sparta was the greatest glory he could achieve in his life.
10 seconds sound clip from the 300 movie soundboard.
You can hear this line at 00:02:01 in the Blu-ray version of the movie.
Quote context
[...]
- From the time he could stand, he was baptized in the fire of combat.
- Taught never to retreat, never to surrender.
- The agoge, as it's called, forces the boy to fight.
- Starves them, forces them to steal and if necessary, to kill.
- By rod and lash, the boy was punished, taught to show no pain, no mercy.
[...]