It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.

Creativity is allowing yourself to make mistakes. Art is knowing which ones to keep.

The most important thing in mathematics is to ask the right questions.

在数学中，提出问题的艺术必须比解决问题更有价值。

最好的创新方式是拥抱失败。