They are parallel One and the same causality is viewed from two different perspectives. Ordo et connexio idealum idem est ac ordo et connexio rerum. This may be termed as the psycho-physical parallelism. The remarkable thing is Spirit or Mind becomes weaker in significance. Here is a possibility to consider Spinoza to be a modern forerunner of Materialism .
Universal ideas are more abstract they are more inadequate and confused.
Error appears, however, only when we perceive those inadequate ideas as adequate. They themselves are not error or falsehood. However, Spinoza criticized Descartes in his theory of Free Will. Something is judged good , because one desires and has appetite for it . and Not the reverse. Spinoza reduced Descartes' 6 passions to these 3.