The end does not sanctify the means.
The original proverb runs the other way, and most languages cite it as a cynical observation about how the world works. German most often cites it negated, as a rule.
philosophy
Critique of Pure Reason
Kant’s project in 1781 was not to reach conclusions about the world. It was to examine the instrument first — to establish what reason can and cannot validly do, before using it.
Critique, in his title, does not mean criticism. It means examining the apparatus.
The most influential work in German philosophy is an inspection of the method, carried out before the work begins.
Pragmatism as a national philosophy
Peirce, James and Dewey between them built the only philosophical school America originated, and its founding move was to test ideas by their consequences rather than their coherence. It shaped Progressive-era reform, the New Deal, and American legal thinking. The country’s one native philosophy is a philosophy of what works.
Cash value
America produced one original school of philosophy, and it is named after practical consequence. In Pragmatism (1907) William James asked of any belief: what concrete difference will its being true make in anyone’s actual life? What, in short, is the truth’s cash-value in experiential terms?
He described the pragmatic method as looking away from first things, principles, categories and supposed necessities, and toward last things, fruits, consequences, facts.
And he put the conclusion as bluntly as it can be put: truth happens to an idea. It becomes true, is made true by events.
Proportionality
A constitutional principle in German law with a defined three-part test: suitability, necessity, and appropriateness in the narrow sense. Judgment is required, and the structure within which it must be exercised is itself specified.
The reasonable person
American negligence law measures conduct against what a reasonable person would have done in the circumstances. The standard is deliberately not a rule. It is a judgment, made afterwards, by a jury, about what judgment should have been made at the time.
To the things themselves
To the things themselves. Husserl’s demand, and the founding instruction of phenomenology: set aside theory, assumption and inherited interpretation, and attend to what is actually there.
The most abstract philosophical movement Germany produced began by insisting on the concrete.
Contrary to good morals
Sittenwidrigkeit. Section 138 BGB voids a legal transaction that offends good morals, and specifically one where a party exploits another’s predicament, inexperience or weakness to obtain a conspicuously disproportionate advantage. A German contract can be void because the bargain was too one-sided. Not misrepresented, not coerced — just too unequal.
Contracts must be kept
Pacta sunt servanda is quoted in German legal education as the foundation of contract law, and German civil law treats the binding force of agreement as a starting premise rather than as one consideration among several. An agreement is not a statement of current intention that both sides revisit. It is the thing that was settled.
A promise without a bargain
American contract law will not enforce a promise unless something was given in exchange for it. The doctrine is called consideration, and the Restatement defines it as a bargained-for exchange.
A promise to drive a friend to the airport for nothing is not enforceable, however clearly and unequivocally the promisor expressed a wish to be bound. A promise to pay a taxi driver is.
An American yes, on its own, carries no legal weight at all. The question is always what came back the other way — which is why a yes can be given freely and why its reliability has to be established some other way.