The superior power of population cannot be checked without producing misery or vice.
Producing Superior Checked
The histories of mankind are histories only of the higher classes.
Higher Histories Classes
A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted.
No limits whatever are placed to the productions of the earth; they may increase forever.
Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.
Doubling Geometrical Goes
The ordeal of virtue is to resist all temptation to evil.
Ordeal Virtue Evil
The rich, by unfair combinations, contribute frequently to prolong a season of distress among the poor.
Each pursues his own theory, little solicitous to correct or improve it by an attention to what is advanced by his opponents.
Pursues Own Advanced
I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.
Will Supposed Earth
I think it will be found that experience, the true source and foundation of all knowledge, invariably confirms its truth.
Confirms Foundation Will
It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.
The constant effort towards population, which is found even in the most vicious societies, increases the number of people before the means of subsistence are increased.
Increases Subsistence Before