Science is the attempt to make the chaotic diversity of our sense experience correspond to a logically uniform system of thought.
— Albert Einstein

Hate is only a form love that hasn't found a way to express itself logically.
Lil Wayne logically quote

There is a connection, hard to explain logically but easy to feel, between achievement in public life and progress in the arts. The age of Pericles was also the age of Phidias. The age of Lorenzo de Medici was also the age of Leonardo da Vinci. The age of Elizabeth was also the age of Shakespeare. And the New Frontier for which I campaign in public life, can also be a New Frontier for American art.
— John F. Kennedy

By the definition accepted in the United States, any person with even a small amount of Negro Blood... is a Negro. Logically, it would be exactly as justifiable to say that any person with even a small amount of white blood is white. Why do they say one rather than the other? Because the former classification suits the convenience of those making the classification. Society, in short, regards as true those systems that produce the desired results. Science seeks only the most generally useful systems of classification; these it regards for the time being, until more useful classifications are invented, as true.
— S. I. Hayakawa

There is no society known where a more or less developed criminality is not found under different forms. No people exists whose morality is not daily infringed upon. We must therefore call crime necessary and declare that it cannot be non-existent, that the fundamental conditions of social organization, as they are understood, logically imply it.
— Emile Durkheim