The advancement of mathematics is due to those who are driven not by the desire for application but by the joy of discovery.
科学不是形式逻辑——它需要思想的自由发挥,与其他任何创造性艺术一样。
向一个人展示他在错误中是一回事,让他掌握真理是另一回事。
当没有人相信你时,你必须相信自己。