Success comes from focusing on what you can control and letting go of what you cannot.

未来并非命中注定。没有保证。所以，把握你的成年期。要有目的性。开始工作。

As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

患者必须始终是我们所做一切的核心。