抽象允许一种自由，而具象有时无法做到。
Abstraction allows for a kind of freedom that representation sometimes doesn't.
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.
你拥有的最强武器是你的头脑。好好训练它。
A world without forests is a world without breath.