[Jobs] told a reporter that taking LSD was one of the two or three most important things he had done in his life. He said there were things about him that people who had not tried psychedelics — even people who knew him well, including his wife — could never understand.
Unlike many people who have enjoyed success, Jobs is not saying that he was able to succeed despite his illegal drug use; he’s saying his success is in part — in substantial part — because of those illegal drugs (he added that Bill Gates would “be a broader guy if he had dropped acid once”).