The ordeal of virtue is to resist all temptation to evil.
Man cannot live in the midst of plenty.
Subsistence increases only in an arithmetical ratio.
Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.
It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.
The prodigious waste of human life occasioned by this perpetual struggle for room and food, was more than supplied by the mighty power of population, acting, in some degree, unshackled, from the constant habit of emigration.