Leo Szilard (1898-1964) was a Hungarian physicist best known for writing the Einstein-Szilard letter to Franklin Roosevelt in 1939 that lead to the Manhattan Project and the development of the atomic bomb. The rest of this post is some quotes from Szilard.
Success
"The most important step in getting a job done is the recognition of the problem. Once I recognize a problem I can think of someone who can work it out better than I could." (Quoted in Close-up: I'm Looking for a Market for Wisdom, LIFE Magazine, 1961)
"In order to succeed it is not necessary to be much clever than other people. All you have to do is be one day ahead of them." (Quoted in Close-up: I'm Looking for a Market for Wisdom, LIFE Magazine, 1961)
Science
"A scientist's aim in a discussion with his colleagues is not to persuade, but to clarify." (The Voice of Dolphins and Other Stories, 1961)
"In science it is not enough to think of an important problem on which to work. It is also necessary to know the means which could be used to investigate the problem." (AZQuotes.com)
