If I am not for myself, who is for me? And if I am only for myself, what am I? If not now, when?

If I am not for myself, who is for me? And if I am only for myself, what am I? If not now, when?

我若不为自己，谁为我呢?如果我只为我自己，我是什么?如果不是现在，什么时候?

-- Rabbi Hillel 拉比希列