Facts are constituted by older ideologies, and a clash between facts and theories may be proof of progress.

Humane science must be adapted to the requirements of a balanced and rewarding life.

The material which a scientist actually has at his disposal, his laws, his experimental results, his mathematical techniques, his epistemological prejudices, his attitude towards the absurd consequences of the theories which he accepts, is indeterminate in many ways, ambiguous, and never fully separated from the historical background . This material is always contaminated by principles which he does not know and which, if known, would be extremely hard to test.

Without a constant misuse of language there cannot be any discovery, any progress

The church at the time was much more faithful to reason than Galileo himself, and also took into consideration the ethical and social consequences of Galileo's doctrine. Its verdict against Galileo was rational and just.

I do not see why I should be polite to tyrants, who slobber of humanitarianism and think only of their own petty interests.

Those who violate the rules of a language do not enter new territory; they leave the domain of meaningful discourse. Even facts in these circumstances dissolve, because they are shaped by the language and subjected to its limitations.