The boundary between inside and outside is not a line, but a gradient.
每一本书都是通往另一个世界的门,每一个读者都是旅行者。
Sustainability isn't an option; it's a responsibility we owe to future generations.
That which is, is peace. All that we need do is to keep quiet.
唯一的限制是你为自己设定的限制。
拼命奋斗,保持谦逊。