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Thesis
Section 2 is not really about “神农《食经》“茶茗久服令人有力悦志””; it is about how Lu Yu turns tea from a local product into an object of argument.
Text
“Shennong’s Classic of Food says: ‘Long use of cha and ming makes a person strong and gladens the spirit.’”
Context
托名神农的《食经》认为，长期饮茶能使人有力气、心情愉悦。
Evidence
- Collation: "令人有力、悦志"各本一致；《食经》为托名古书，今已亡佚，赖《茶经》引文得存一鳞。
- Existing readings: 吴觉农评此条为茶"悦志"功效的最早记载：现代研究表明茶中咖啡因与茶氨酸协同，确有提神而安神之效——与"有力悦志"暗合。
Analysis
Formally, the section gives a judgment, adds material detail, then returns to human practice. 托名神农的《食经》认为，长期饮茶能使人有力气、心情愉悦。 That is why the Classic of Tea reads as an argued book rather than a miscellany.
Conclusion
The section does not give a universal rule. It demonstrates a method: read the text, the annotation and the Tang context together before making a modern claim.
Source: The Classic of Tea, Chapter VII · The History, section 2; the original is in the public domain.
Get the character right before the taste.