We cannot always build the future for our youth, but we can build our youth for the future.

The complexity of a learning problem is often determined by the size and structure of the hypothesis space.

I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

有些书最好的部份仅止于封面与书背。