Private property is a means, and neither its abolition nor its unrestricted right should be an end in itself.

Physicists can only talk to other physicists and economists to economists... sociologists often cannot even understand each other.

We should always bear in mind that numbers represent a simplification of reality.

Thus we seem to be on the verge of an expansion of welfare economics into something like a social science of ethics and politics: what was intended to be a mere porch to ethics is either the whole house or nothing at all. In so laying down its life welfare economics may be able to contribute some of its insights and analytical methods to a much broader evaluative analysis of the whole social process.

With laissez-faire and price atomic, ecology's uneconomic, But with another kind of logic economy's unecologic.

If we saw tomorrow's newspaper today, tomorrow would never happen.

Conventions of generality and mathematical elegance may be just as much barriers to the attainment and diffusion of knowledge as may contentment with particularity and literary vagueness... It may well be that the slovenly and literary borderland between economics and sociology will be the most fruitful building ground during the years to come and that mathematical economics will remain too flawless in its perfection to be very fruitful.