Science is not only a discipline of reason but also one of romance and passion.

市场是人类创造物，和所有人类创造物一样，它们可以被改进。

"The colony is the place where the project of a new humanity is to be tested, where the dream of a world without borders is to be realized."

Every child should have mud pies, grasshoppers, water bugs, tadpoles, frogs, mud turtles, elderberries, wild strawberries, acorns, chestnuts, trees to climb, brooks to wade in, water lilies, woodchucks, bats, bees, butterflies, various animals to pet, hayfields, pine-cones, rocks to roll, sand, snakes, huckleberries and hornets; and any child who has been deprived of these has been deprived of the best part of education.

The greatest blessing of our democracy is freedom. But in the last analysis, our only freedom is the freedom to discipline ourselves.