Frege has the merit of ... finding a third assertion by recognising the world of logic which is neither mental nor physical.
Interpretation
The quote emphasizes Frege's contribution to logic by introducing a perspective that transcends traditional mental and physical assertions.
Bertrand Russell highlights Frege's significant achievement in the realm of logic by identifying a realm of thought that exists independently of both subjective mental states and the objective physical world. This notion represents a breakthrough in understanding the nature of assertions and the foundations of logic, indicating that there are truths that belong to a logical framework distinct from our mental or physical experiences.
In practice
In a philosophy lecture discussing the contributions of Frege to logic.
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.
sleep is the most innocent creature there is and a sleepless man the most guilty.
Temptation is an irresistible force at work on a movable body.
People never lie so much as after a hunt, during a war or before an election.
Our world hangs like a magnificent jewel in the vastness of space. Every one of us is a part of that jewel. A facet of that jewel. And in the perspective of infinity, our differences are infinitesimal.
...the self-satisfied dogmatism with which mankind at each period of its history cherishes the delusion of the finality of existing modes of knowledge.
No man need fear death, he need fear only that he may die without having known his greatest power: the power of his free will to give his life for others
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