Jazz exemplifies artistic activity that is at once individual and communal, performance that is both repetitive and innovative, each participant sometimes providing background support and sometimes flying free.

Traditionally in American society, men have been trained for both competition and teamwork through sports, while women have been reared to merge their welfare with that of the family, with fewer opportunities for either independence or other team identifications, and fewer challenges to direct competition. In effect, women have been circumscribed within that unit where the benefit of one is most easily believed to be the benefit of all.

Every loss recapitulates earlier losses, but every affirmation of identity echoes earlier moments of clarity.

Orthodox Judaism is a thicket of detailed injunctions, Biblical commandments elaborated during centuries of prohibited proselytizing, functioning to limit interaction with outsiders. At the opposite extreme, Islam, still the most rapidly expanding of faiths, demands little immediate knowledge from those who would convert. The convert is permitted to enter and then to learn by participation, although there are plenty of detailed regulations and abstruse theological ideas to be pursued later, and the regulations do effectively separate believers from nonbelievers.

Fear is not a good teacher. The lessons of fear are quickly forgotten.

In many ways, constancy is an illusion. After all, our ancestors were immigrants, many of them moving on every few years; today we are migrants in time. Unless teachers can hold up a model of lifelong learning and adaptation, graduates are likely to find themselves trapped into obsolescence as the world changes around them. Of any stopping place in life, it is good to ask whether it will be a good place from which to go on as well as a good place to remain.

There are few things as toxic as a bad metaphor. You can't think without metaphors.