Definition of God and Will

peace,
The rabbi writes regarding free choice that he advocates that there is matter and spirit, but he does not know what spirit/will is.
That's a meaningless sentence, isn't it?
So it is with God. You also know His actions, but you do not speak of His essence.
Therefore, of course, as long as you don't give a definition to the entity itself, it's a sign that you don't really believe in it, because there simply isn't such an entity if you're not willing to define it.
Unless the rabbi has a definition for the concept of will or God, then he is welcome to write… until then, he simply does not believe in anything.