The pendulum of mathematics swings back and forth towards abstraction and away from it with a timing that remains to be estimated.
Gian-Carlo RotaVery little mathematics has direct applications - though fortunately most of it has plenty of indirect ones.
Gian-Carlo RotaMaking mathematics accessible to the educated layman, while keeping high scientific standards, has always been considered a treacherous navigation between the Scylla of professional contempt and the Charybdis of public misunderstanding.
Gian-Carlo RotaEvery field has its taboos. In algebraic geometry the taboos are (1) writing a draft that can be followed by anyone but two or three of one's closest friends, (2) claiming that a result has applications, (3) mentioning the word 'combinatorial,' and (4) claiming that algebraic geometry existed before Grothendieck (only some handwaving references to 'the Italians' are allowed provided they are not supported by specific references).
Gian-Carlo Rota