The deeper you go into mathematics, the more you realize how much remains unknown.
The light constantly changes, and that alters the atmosphere and beauty of things every minute.
数学家研究纯数学不是因为它有用;他研究它是因为他喜欢它,他喜欢它是因为它美丽。
科学的进步不是一条直线,而是一系列曲折,常常需要回溯步骤以获得更好的立足点。
怀疑是智慧的开始。