Action is the most important section, IMHO. I'll excerpt Wikipedia's summary of it in its entirety:
The third activity, that of great deeds and great words, is specifically political and properly construed can only take place in the public realm potentially leading to the only form of immortality properly accepted in ancient Greece, that of creating something lasting within the world. This world is also made common through action. It necessitates speech (logos), since the actor needs to declare his or her unique existence in order for that action to be considered human. Other actions exist of course, such as bartering goods in a market, that do not require such a unique declaration. These, however, are products of the subject's necessity (ex. obtain food to survive) and not some unique individuality which is properly his. In this sense, worker's equality is almost a tautology, since it equates people through the basic human condition of need, while citizen's equality is by definition equality of unequals that are trying to create a common world. Its corresponding conditions are natality and plurality. Action can never manifest through a predictable, deterministic series of consequences, since the subject, by acting, is placed within a complicated web of relationships which cannot be predicted before hand. In the same sense, Action is irreversible.
https://en.wikipedia.org/wiki/Th...
GAFAnomics Season 2