From The Chronicle of Higher Education:
If you wish to be a prophet, first you must dress the part. No more silk ties or tasseled loafers. Instead, throw on a wrinkled T-shirt, frayed jeans, and dirty sneakers. You should appear somewhat unkempt, as if combs and showers were only for the unenlightened. When you encounter critics, as all prophets do, dismiss them as idiots. Make sure to pepper your conversation with grandiose predictions and remind others of your genius often, lest they forget. Oh, and if possible, grow a very long beard. By these measures, Aubrey de Grey is indeed a prophet. The 42-year-old English biogerontologist has made his name by claiming that some people alive right now could live for 1,000 years or longer. Maybe much longer.