Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

You have to be willing to make mistakes regularly; there is nothing wrong with it. Michael taught me about making your best judgment, being wrong, making your next best judgment, being wrong, making your third best judgment, and then doubling your money.

Sustainability isn't an option; it's our responsibility to the next generation.

教育学不是关于训练，而是关于严格教育人们进行自我反思，能够批判性地处理他们与他人及更广阔世界的关系。