After interviewing over 100 successful people, Tim Ferriss says a passage from a 1922 novel captures the approach every high performer takes

Since starting his podcast in 2014, bestselling author Tim Ferriss has interviewed well over 100 highly successful people, from Navy SEALs to billionaire entrepreneurs.

He uses his interviews to pick apart the, as he puts it, “tactics, routines, and habits,” that have brought these subjects to the tops of their fields. He’s collected his favorite lessons from these discussions, along with a few new ones, in his book “Tools of Titans.”

Ferriss recently stopped by Business Insider’s New York office for a Facebook Live Q&A, and explained that there is a passage in Herman Hesse’s 1922 novel “Siddhartha” that offers a suitable lens for all of the “tools” he shares in his book.

The novel “Siddhartha” tells the story of a young monk’s quest for enlightenment (the Buddha narrative). Four of Ferriss’ guests included in “Tools of Titans” said it was the book they most often gave as a gift to others, including renowned Silicon Valley investor Naval Ravikant.

Ravikant was the person to highlight for Ferriss the passage in which the protagonist is asked by a merchant how he can offer anything to the world if he has discarded all of his possessions. Siddhartha tells the merchant that, “Everyone gives what he has,” and the merchant replies, “Very well, and what can you give? What have you learned that you can give?”