…However, it is permissible to investigate and seek to understand everything that comes after this foundation, namely how these levels function in the government of the worlds.
We are not investigating either the essence of the Emanator, blessed be His Name, or even the essence of the Sefirot themselves, which are in simple unity with the essence of the Emanator – for they are nothing but the powers of His thought. We are concerned only with the functioning of His powers and the way they govern. Of this it is said: “In what is permitted to you, seek understanding” (Chagigah ibid.).