Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
数学不是沿着一条清理得很好的高速公路小心行进，而是一次进入陌生荒野的旅程，探险者常常会迷路。
La poesía es la única prueba concreta de la existencia del hombre.
从非工作状态到工作状态的最佳性能改进。
You think you know when you can learn, are more sure when you can write, even more when you can teach, but certain when you can program.