The meaning of a word evolves. And this is what we call Philosophy. Thus, saying a word, or words, or... tweeting words, involves Philosophy. Also, not to forget, the diction shows your mental condition. And by mental, of course, it also means your emotion. To recall mental, re-read Sigmund Freud, and to recall emotion, Robert Plutchik, also Abraham Maslow as a variation to deepens your memory on Robert Plutchik. Nowadays relevant read related: 1. Portraits of the Self by Constantine Sedikides and Aiden Gregg 2. Anticipated nostalgia: Looking forward to looking back by Wing-Yee Cheung, Erica G. Hepper, Chelsea A. Reid, Jeffrey D. Green, Tim Wildschut & Constantine Sedikides Saying a word impacts brain.