What does the speaker mean when he says that his courage is at a “low ebb”?

that his courage is not very strong, like a low tide

Explanation:

in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.

hello and welcome to the town of river dale. if you come to river-dale trust me you wouldn't want to leave.