世界是一本书,不旅行的人只读了一页。
死者并未消失。他们只是看不见了。
发现的喜悦无疑是人类心灵所能感受到的最活跃的体验。
True courage is not the absence of fear, but moving forward in the face of fear.
Science progresses not just by answering questions, but by asking better ones.