This is the essence of the faith of Israel, which depends only on the Cause of all causes. Accordingly they have faith in Him despite the protracted exile, even though they see so much that is the opposite of the truth and face so many challenges from the Other Side. Yet through the power of His unity, they endure everything. Thus the above-quoted passage continues: “Because of this, the faith of Israel is centered on these four letters” – the four letters of the Name of HaVaYaH.
Similarly, we find in the Zohar (Vayera 117a): “Rabbi Yose said to him, ‘Well spoken, because He is within the mystery of the letters [of the Name of HaVaYaH], and we should not get involved in other calculations of the end of time’.” It is perfectly evident from this passage that the Redemption depends upon the mystery of these letters. And the reason is that through these letters the Cause of all causes unifies all the different levels, and this is what the Redemption truly depends upon without any doubt at all.