Assalamualaikum

Ghamidi sahab says that there is another field of knowledge in which science hasn’t stepped in yet.What does he means by these nafsi uloom?Is that what Ghamidi sahab says Quran has used word “rooh”(soul) and that our “nafs”(self)now,our “shakhsiyah” or what?

And is this that knowledge which mystics or sufis use to get to know the reality through their inner self?