The immediate cause of the increase of population is the excess of the births above deaths; and the rate of increase, or the period of doubling, depends upon the proportion which the excess of the births above the deaths bears to the population.

The rich, by unfair combinations, contribute frequently to prolong a season of distress among the poor.

The most baleful mischiefs may be expected from the unmanly conduct of not daring to face truth because it is unpleasing.

The ordeal of virtue is to resist all temptation to evil.

I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.

It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.

If it be taught that all who are born have a right to support on the land, whatever be their number, and that there is no occasion to exercise any prudence in the affair of marriage so as to check this number, the temptations, according to all the known principles of human nature, will inevitably be yielded to, and more and more will gradually become dependent on parish assistance.