I've read the original online (All Sounds To Silence Come: The Rewards of Living a Solitary Life). By "no self there to meet" the author must have meant either that he was there all alone with no other people around, no one to mislead or confuse you.
"With another human being present vision becomes double vision, inevitably. We are busy wondering, what does my companion see or think of this, and what do I think of it? The original impact gets lost, or diffused."
"The salt of personhood" must imply that solitude can bring a lot of excitement into life, can help you appreciate life, help you perceive its enigmatic ways.
Student or Learner