Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
"Books are the windows to other realities."
唯一的好是知识，唯一的恶是无知。
If knowledge can create problems, it is not through ignorance that we can solve them.
El tiempo no pasa, somos nosotros quienes pasamos a través de él.