A philosophical problem has the form: 'I don't know my way about.'

The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.

Sometimes it's very difficult being a dog…

The function of freedom is to free someone else.

If you’re not failing, you’re not pushing hard enough.

我学到的是，成功不在于目的地，而在于旅程。