Tetrad Quotes

In Tetrad form, the artefact is seen to be not neutral or passive, bur an active logos or utterance of the human mind or body that transforms the user and his ground. (Marshall McLuhan)
The laws of the media, in tetrad form, bring logos and formal cause up to date to reveal analytically the structure of all human artefacts. View quote
Marshall McLuhan
Each tetrad gives the etymology of its subject, as an uttering or outering of the body physical or mental, and provides its anatomy in fourfold exegetical manner. View quote
Marshall McLuhan
Meditate upon my counsels; love them; follow them; To the divine virtues will they know how to lead thee. I swear it by the One who in our hearts engraved The sacred Tetrad, symbol immense and pure, Source of Nature and model of the Gods. View quote
Pythagoras