The fundamental differences ...

The fundamental differences between Marxian and traditional orthodox economics are, first, that the orthodox economists accept the capitalist system as part of the eternal order of Nature, while Marx regards it as a passing phase in the transition from the feudal economy of the past to the socialist economy of the future.
 Joan Robinson

Quotes from the same author

we make a great fuss about national conscience, but it consists mainly in insisting upon everyone ascribing our national policy to highly moral motives, rather than in examining what our motives really are.
 Joan Robinson
Not only subjective poverty is never overcome by growth, but absolute poverty is increased by it. ... Absolute misery grows while wealth increases.
 Joan Robinson
Marx, however imperfectly he worked out the details, set himself the task of discovering the law of motion of capitalism, and if there is any hope of progress in economics at all, it must be in using academic methods to solve the problems posed by Marx.
 Joan Robinson
Where is the pricing system that offers the consumer a fair choice between air to breathe and motor cars to drive about in?
 Joan Robinson
It is the business of economists, not to tell us what to do, but show why what we are doing anyway is in accord with proper principles.
 Joan Robinson