The phrase "in his conception" is correct and can be used in written English.
It typically refers to someone's understanding or perception of something at a certain point in time, usually in the past. It can also refer to a creative idea or plan that someone has developed. Example: "In his conception of democracy, James believed in the power of the individual to create change." Here, "in his conception" highlights the idea or understanding that James held about democracy at a specific point in time. "To build his dream home, John had to first put his ideas on paper and develop them in his conception." In this example, "in his conception" emphasizes the creative process that John underwent in envisioning and planning his dream home.
Here Foucault qualifies, but nevertheless retains, a concept of warlike flux in his conception of power.
The number of sports the city could support seemed, in his conception, limitless.
In his conception, a simple robot (a "Turing machine") is supplied with a paper tape.
But I suspect there is something more lofty, more idealised, even more nationalistic in his conception of purity.
Le Corbusier was decades ahead of his time, not just in aesthetics but in his conception of lifestyle.
Delight in the fact that, in his conception of the ideal production of the "Ring," Wagner wanted the theater burned down at the cycle's conclusion.
Schelling's appointment to the University of Berlin in 1841 gave him an opportunity once again to develop public interest in his conceptions.
Christopher Tolkien suggests that his father abandoned "The Fall of Arthur" partly because of the demands of work and family and partly because of "the great sea changes that were taking place" in his conceptions as he completed "The Hobbit" and worked more intently on the mythic material that would give rise to "Lord of the Rings".
Aided by an expert staff (particularly his carefully selected aides-de-camp such as Cadogan), as well as enjoying a close personal relationship with the talented Imperial commander, Prince Eugene, Marlborough proved far-sighted, often far ahead of his contemporaries in his conceptions, and was a master at assessing his enemy's characteristics in battle.
Any account of Nietzsche's "positive ethics" confronts a threshold worry, namely, that Nietzsche's naturalistic conception of persons and agency — and, in particular, his conception of persons as constituted by non-conscious type-facts that determine their actions — makes it unclear how Nietzsche could have a philosophical ethics in any conventional sense.
In Hegel, the non-traditionalists argue, one can see the ambition to bring together the universalist dimensions of Kant's transcendental program with the culturally contextualist conceptions of his more historically and relativistically-minded contemporaries, resulting in his controversial conception of spirit, as developed in his Phenomenology of Spirit.
