Disability need not be an obstacle to success.

You may see a cup of tea fall off a table and break into pieces on the floor... But you will never see the cup gather itself back together and jump back on the table. The increase of disorder, or entropy, is what distinguishes the past from the future, giving a direction to time.

A picture is worth a thousand words...and uses up a thousand times the memory.

There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be in opposition.

There is nothing bigger or older than the universe.

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.