"In comparing therefore the value of the same commodity, at different periods of time, the consideration of the comparative skill and intensity of labour, required for that particular commodity, needs scarcely to be attended to, as it operates equally at both periods"

David Ricardo, a popular classical economist, uses a perspective in this quote that intends to streamline the comparative analysis of a product's worth over different periods. At its core, Ricardo emphasizes that when examining the value of an offered commodity at various times, the varying degrees of skill and strength of labor involved in its production need not be a significant focus. This is since such variations are presumed to impact the product's production regularly across both time periods in concern, therefore negating their significance in relative worth analysis.

By getting rid of the emphasis on labor ability and intensity, Ricardo simplifies the equation of value contrast, redirecting attention towards other elements that might affect a product's worth, such as technological advancements, resource availability, or shifts in supply and demand. His assertion rests on the facility that labor skill and strength, while contributing to production costs and effectiveness, do so uniformly in time, canceling out their effects in examining changes in product value.

This approach aligns with Ricardo's more comprehensive financial concepts, particularly his theory of comparative benefit which focuses on the relative efficiency of production processes gradually instead of outright expense parts. It indicates that in a stable economic environment, improvements or changes in labor effectiveness are naturally soaked up into the product's value with time through market adjustments.

In addition, Ricardo's declaration may show the economic conditions of his time, where labor variations were less pronounced than today due to limited technological change and fairly steady labor markets. In contemporary terms, however, globalization and technological developments may challenge such presumptions, as ability and labor intensity can differ significantly, impacting relative value differently.

In general, Ricardo's perspective motivates economists to look beyond labor as a changing component in historic commodity worth evaluations, focusing rather on more comprehensive, more prominent economic aspects that drive modifications over time.