From Simon Evans:

Do not confine your children to your own learning, for they were born in a different time.  – Hebrew proverb

From Greg Farr:

It is important that students bring a certain ragamuffin, barefoot irreverence to their studies; they are not here to worship what is known, but to question it.  – Jacob Bronowski

From Richard Florida:

In the US, there are nine cities with more than 1m inhabitants. In China, there are 49. You can be travelling across China, arrive in a city that is twice the size of Houston, and think: I've never even heard of this place.  – Rob Gifford