At the heart of science lies discovery which involves a change in worldview. Discovery in science is possible only in societies which accord their citizens the freedom to pursue the truth where it may lead and which therefore have respect for different paths to that truth.

Nothing is more irredeemably irrelevant than bad science.

In nation after nation, democracy has taken the place of autocracy.

Authority in science exists to be questioned, since heresy is the spring from which new ideas flow.

The applause is a celebration not only of the actors but also of the audience. It constitutes a shared moment of delight.

Even in the world of molecules the civilising influence of modest restraints is a cause for rejoicing.

When, as we must often do, we fear science, we really fear ourselves. Human dignity is better served by embracing knowledge.