A priori Logical propositions are such as can be known a priori without study of the actual world.
Interpretation
A priori propositions are those that can be understood without empirical evidence or experience.
The quote by Bertrand Russell discusses the nature of a priori logical propositions, which are inherent truths or knowledge that can be known independently of experience in the physical world. This highlights a critical distinction in philosophy between what can be deduced through reason alone and what must be verified through observation and empirical study, emphasizing the value and limitations of different types of knowledge.
In practice
This quote can be used in a philosophy class discussion about the nature of knowledge.
St. Paul introduced an entirely novel view of marriage, that it existed primarily to prevent the sin of fornication. It is just as if one were to maintain that the sole reason for baking bread is to prevent people from stealing cake.
Freedom comes only to those who no longer ask of life that it shall yield them any of those personal goods that are subject to the mutations of time.
Of these austerer virtues the love of truth is the chief, and in mathematics, more than elsewhere, the love of truth may find encouragement for waning faith. Every great study is not only an end in itself, but also a means of creating and sustaining a lofty habit of mind; and this purpose should be kept always in view throughout the teaching and learning of mathematics.
At all times, except when a monarch could enforce his will, war has been facilitated by the fact that vigorous males, confident of victory, enjoyed it, while their females admired them for their prowess.
Moreover, the attitude that one ought to believe such and such a proposition, independently of the question whether there is evidence in its favor, is an attitude which produces hostility to evidence and causes us to close our minds to every fact that does not suit our prejudices.
Extreme hopes are born from extreme misery.
Don't overestimate the decency of the human race.
There is no broader way to apostasy than to reject God's sovereignty in all things concerning the revelation of himself and our obedience.
There is no such thing as chance; and what seem to us merest accident springs from the deepest source of destiny.
Strapped, noosed, nighing his hour, He stood and counted them and cursed his luck; And then the clock collected in the tower Its strength, and struck.
Economic theorists, like French chefs in regard to food, have developed stylized models whose ingredients are limited by some unwritten rules. Just as traditional French cooking does not use seaweed or raw fish, so neoclassical models do not make assumptions derived from psychology, anthropology, or sociology. I disagree with any rules that limit the nature of the ingredients in economic models.
Because there is a law such as gravity, the Universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the Universe exists, why we exist. It is not necessary to invoke God to light the blue touch paper and set the Universe going.
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