Measures of sterilization should, in my opinion, be very definitely confined to persons who are mentally defective
The essence of the Liberal outlook lies not in what opinions are held, but in how they are held instead of being held dogmatically, they are held tentatively, and with a consciousness that new evidence may at any moment lead to their abandonment.
Freedom of opinion can only exist when the government thinks itself secure.
In America everybody is of the opinion that he has no social superiors, since all men are equal, but he does not admit that he has no social inferiors, for, from the time of Jefferson onward, the doctrine that all men are equal applies only upwards, not downwards.
A process which led from the amoeba to man appeared to the philosophers to be obviously a progress though whether the amoeba would agree with this opinion is not known.
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.
Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.
Some advanced thinkers' are of the opinion that anyone who differs from the conventional opinion must be in the right. This is a delusion if it were not, truth would be easier to come by than it is
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