Men are to be punished by the criminal law in order to prevent crime, not because we hate the criminal.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“It is to the interest of the public that I should abstain from theft, but it is only to my interest where there is an effective criminal law. Thus the criminal law is a method of making the interests of the individual coincide with those of the community; that is its justification. Men are to be punished by the criminal law in order to prevent crime, not because we hate the criminal. It is more important that the punishment should be certain than that it should be severe. In his day, in England, many quite minor offences were subject to the death penalty, with the result that juries often refused to convict because they thought the penalty excessive.” source