"I cannot understand a thing," then what is metaphysical discussion oriented around?

[anagogy]

Words are signs. Pointers. They can't communicate the reality, but they might light the way for some people. Everybody has access to intuition. Sometimes words help people zone in on metaphysical realities that they know on an intuitive level, but couldn't intellectually verbalize in a logical manner. It is like listening to music. You don't need someone to tell you that a song is harmonious, you just know it, balls to bones. Intuition is the same way once it is honed, you can hear the pitch, the rhythm, and timbre of the truth being expressed. The serious truth seeker is engaged in a constant journey of synthesizing logic and intuition.