If quantum communication and quantum computation are to flourish, a new information theory will have to be developed.

In fact, an information theory that leaves out the issue of noise turns out to have no content.

An electron is real; a probability is not.

Time has been called God's way of making sure that everything doesn't happen at once. In the same spirit, noise is Nature's way of making sure that we don't find out everything that happens. Noise, in short, is the protector of information.

Both induction and deduction, reasoning from the particular and the general, and back again from the universal to the specific, form the essence to scientific thinking.

Information gently but relentlessly drizzles down on us in an invisible, impalpable electric rain.

If you don't understand something, break it apart; reduce it to its components. Since they are simpler than the whole,you have a much better chance of understanding them; and when you have succeeded in doing that, put the whole thing back together again.