In psychology, zest and vitality are combination of the physical sense and the psychological sense of feeling well. Zest is about exhibiting enthusiasm and feeling energised.
In the 1920s, this was exactly what jazz was all about.
It broke the rules, to become a new way of making music. It brought about new ways of performing by offering a new and different rendition every time musicians performed, depending on the mood of the people and their reactions. It was resilient to be written down, it suffered from recording.
Jazz expressed the exhilaration for a new life, new values, new possibilities and also the unpredictability of the outcome.
It expressed a need for freedom and the positivity of coming together and make something new, even when detractors thought this only created noise without any harmony.
It expressed the break form the past. Not the rejection of it, but the breaking away in search of new paths and new possibilities.
It was a music that seemed to destroy and create at the same time. A music that created divisions even if it was all about collaboration. A music that was deemed devilish and deviant even when encouraged free expression.
For so many reasons, jazz was indeed the more precise definition of the Jazz Age.
Ogren, Kathy J., The Jazz Revolution. Twenties America and the Meaning of Jazz. Oxford University Press, New York, 1989