This July, I am completing my fourth seven-yearterm at NIH. It seems as exhilarating and certainly asworthwhile as in the summer of 1953, when my wife and I arrived in Bethesda. The last six years, however, I must confess,have been spent in the relentless company of the administrative burdens of the Director. I have decided with great difficulty and muchambivalence, that it's time for me to shed those burdens for a while, lest I forget completelyhow to be a scientist and a physician. And therefore, yesterday I sent to the Presidenta letter containing these sentences: Dear Mr. President,I respectfully request that on the first day of July you accept my resignation as Directorof the National Institutes of Health. It is for personal reasons that I take leaveof this position, which I have been honored to hold these past six years. Before then, I was also privileged to spendmuch of my scientific career at the National Institutes of Health. I am most grateful, I wrote, for the continuingtrust which you and Presidents Ford and Carter have extended in allowing me to lead thisremarkable institution.