John Stuart Mill Quotes
The validity of all the Inductive Methods depends on the assumption that every event, or the beginning of every phenomenon, must have some cause; some antecedent, upon the existence of which it is invariably and unconditionally consequent.
Mill, John Stuart. A System of Logic, Ratiocinative and Inductive. John W. Parker, 1843, Book III, ch. 5.
John Stuart Mill, usually cited as J. S. Mill, was an English philosopher, political economist, Member of Parliament, and civil servant. One of the most influential thinkers in the history of classical liberalism, he contributed widely to social theory, political theory, and political economy. Dubbed "the most influential English-speaking philosopher of the nineteenth century", he conceived of liberty as justifying the freedom of the individual in opposition to unlimited state and social control.