I don’t know whether Secretary of State John Kerry will succeed in his two big chosen priorities: trying to forge an Israeli-Palestinian peace and a détente with Iran that deprives it of a nuclear weapon. But I admire his relentlessness.

I admire the way he dares to fail — the only way to become a consequential secretary of state. And I admire his strategy: trying to construct a diplomacy that makes it impossible for Israel, the Palestinians and Iran to continue avoiding their big existential choices.