Knowledge of birth control is essentially moral. Its general, though prudent, practice must lead to a higher individuality and ultimately to a cleaner race.

No despot ever flung forth his legions to die in foreign conquest, no privilege-ruled nation ever erupted across its borders, to lock in death embrace with another, but behind them loomed the driving power of a population too large for its boundaries and its natural resources.

The procreation of [the diseased, the feeble-minded and paupers] should be stopped.

I think the greatest sin in the world is bringing children into the world that have disease from their parents, that have no chance to be a human being, practically. Delinquents, prisoners, all sorts of things just marked when they're born. That to me is the greatest sin - that people can - can commit.

Birth control is the means by which woman attains basic freedom.

No more children should be born when the parents, though healthy themselves, find that their children are physically or mentally defective.

We gather perfect fruit from perfect trees.