Editor's Note: During the past two months, leading members of the international scientific community were awarded honorary doctorates at dozens of universities in the United States, Canada, and the United Kingdom. At many commencement ceremonies, the recipients seized the opportunity to share with the new graduates their views on what they consider matters of profound importance. Some conveyed broad philosophical messages; others offered morale-building advice. Still others took advantage of the occasion to amplify their call for better relations between government and science--or for better relations between humankind and the environment.

The following excerpts are taken from the 1993 commencement speeches of five honorary degree-winning scientists whose careers have been marked by extraordinary achievement--Baruch Blumberg, Anthony Fauci, Walter Massey, Peter Raven, and Torsten Wiesel.

affairs, University of California. Massey, the former director of the National Science Foundation, was awarded an honorary doctor of humane letters and science degree by the...

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