True discovery often happens at the intersection of curiosity and persistence.
革命是一场漫长而艰苦的斗争，但它是实现真正独立和自由的唯一途径。
Sustainability is not just a trend, it's our responsibility to the planet.
The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.