音乐高于一切。
De la musique avant toute chose.
The true teacher defends his pupils against his own personal influence. He inspires self-trust. He guides their eyes from himself to the spirit that quickens him. He will have no disciple.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
改变是困难的,但对于进步是必要的。
很可能还会发明出其他几种辅助视觉的工具,它们超越现有工具的程度,就像现有工具超越肉眼一样。