Mathematicians may flatter themselves that they possess new ideas which mere human language is as yet unable to express.

Today, we celebrate the fact that this historic document has survived a turbulent five decades, which have seen some of the most extraordinary developments in the evolution of human society. These include the collapse of the colonial system, the passing of a bipolar world, breath taking advances in science and technology and the entrenchment of the complex process of globalisation.

It was a great step in science when men became convinced that, in order to understand the nature of things, they must begin by asking, not whether a thing is good or bad, noxious or beneficial, but of what kind it is.

In order to obtain physical ideas without adopting a physical theory we must make ourselves familiar with the existence of physical analogies. By a physical analogy I mean that partial similarity between the laws of one science and those of another which makes each of them illustrate the other.

You ask me if I keep a notebook to record my great ideas. I've only ever had one.

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