If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.

If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.

如果自然不美丽，就不值得知道;如果自然不值得知道，生命就不值得活下去。

-- Henri Poincare 彭卡勒