Plagiarism saves time.

There should be no boundaries to human endeavor. However bad life may seem, there is always hope.

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.

Nothing is fool-proof to a sufficiently talented fool.

Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries.

Not to leave planet Earth would be like castaways on a desert island not trying to escape...Sending humans to other planets ... will shape the future of the human race in ways we don't yet understand, and may determine whether we have any future at all.

Simplicity is a matter of taste