O pessimista queixa-se do vento
O optimista espera que ele mude
O realista ajusta as velas

William George Ward

The illiterate of the 21st century will not be those who cannot read and write, but those who cannot learn, unlearn, and relearn.

Alvin Toffler

We learn beter by doing...but we learn better still if we combine our doing with talking and thinking about what we have done.

Papert 1997