Q: Passage: The episode's title is a code phrase spoken by Jaqen H'ghar to Arya Stark during the episode, but its meaning is not explained until the third-season episode, "Walk of Punishment": "All men must die." This is consistent with the meaning given in the books upon which the series is based.

Question: Based on this passage, what is valar morghulis in game of thrones?
Let's give stream of consciousness below

The important part for answering this question is: The episode's title is a code phrase spoken by Jaqen H'ghar to Arya Stark during the episode, but its meaning is not explained until the third-season episode, "Walk of Punishment": "All men must die." So the answer is All men must die.