在研究自然时，想象力必须受到逻辑和实验的严格规则指导。

Precision in experimentation is as important as creativity in hypothesis.

Mathematics is the music of reason.

身份不是起点，而是结果。

如果用心一旦松散，那么万事都做不好。如果用心一旦粗疏，那么凡事不能聚精会神。用心一旦固执，凡事就不能见其本来面目。

The oldest， shortest words—'yes' and 'no'—are those which require the most thought.

I've had to learn to shake things off and move on.