score:2
It seems to come from "Unshakeable Peace" by Ven. Ajahn Chah, though not verbatim. You can read the full dhamma talk on that link.
When I train my disciples, I train them to practice like this. Because I want them to see the truth, rather than just read what's in the scriptures; I want them to see if their hearts have been liberated from conceptual thinking.