For a just and lasting peace, here is my solemn pledge to you: by dedication and patience we will continue, as long as I remain your President, to work for this simple - this single - this exclusive goal.

Science is always simple and always profound. It is only the half-truths that are dangerous.

Science burrows its insulted head in the filth of slaughterous inventions.

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

At its heart, engineering is about using science to find creative, practical solutions. It is a noble profession.

To be inspirational you don't have to save lives or win medals.I often draw strength from meeting ordinary people doing extraordinary things: volunteers, carers, community organisers and good neighbours; unsung heroes whose quiet dedication makes them special. They are an inspiration to those who know them.