Isaac Luria has a modification of the theory of ideas of Plato and the Neo Platonics. Just because some people take the Ari in wrong directions does not mean there is nothing to be gained from him.
I was troubled for some time by the fact of the Zohar itself not being from Rabbi Shimon Ben Yochai but I think there is much to be gained from the Ari himself.
I will try to take a minute here to describe my own world view in short terms. In short I take the idea of Kant that there is a limit to pure reason. Beyond that there is the world of the form, [or ideas as Aristotle called it.] That realm has a hierarchy.  Forms of necessity. Areas of more human interest with have less strict forms and more numinous content. But there are areas of the world of forms that are more formal like Mathematical logic. These areas are not completely of bound to human reason because of their formal content.
But even those areas of formal content depend on a kind of knowledge which  reason perceives