This is an admirable law, alike in its cause and its effects; and he who shall succeed in making it well understood, will have a right to say, "I have not, in my passage through the world, forgotten to pay my tribute to society." Every circumstance which favors the work of production is of course hailed with joy by the producer, for its _immediate effect_ is to enable him to render greater services to the community, and to exact from it a greater remuneration.

Every circumstance which injures production, must equally be the source of uneasiness to him; for its _immediate effect_ is to diminish his services, and consequently his remuneration.

This is a fortunate and necessary law of nature.

The immediate good or evil of favorable or unfavorable circumstances must fall upon the producer, in order to influence him invisibly to seek the one and to avoid the other.
Again: when an inventor succeeds in his labor-saving machine, the _immediate_ benefit of this success is received by him.

This again is necessary, to determine him to devote his attention to it.