The phrase "a powerful affirmation of" is correct and usable in written English.
It can be used to emphasize a strong confirmation or support of a particular idea, belief, or value.
Example: "The speech was a powerful affirmation of the need for unity and cooperation among all members of the community."
Alternatives: "a strong endorsement of" or "a compelling confirmation of".
(This, co-op lawyers said at the time, was a powerful affirmation of the power of a board to conduct the affairs of a co-op without judicial interference under the "business judgment rule". The case is now on appeal to the Court of Appeals, the state's highest court).
"It would be a powerful affirmation of the legacy for him".
"We hope that the demonstrations will be peaceful and a powerful affirmation of Iraqi democracy," said the spokesman, Aaron Snipe.
They said the event was a powerful affirmation of their personal beliefs and of the spirit of Opus Dei.
The campaign to retake Krajina was widely seen in Croatia as a just military victory and a powerful affirmation of the country's identity.
James Baldwin, writing in The New York Times, said the work was a powerful affirmation of what he called continuities and consequences in black history.
Several days after the copies were delivered, my niece Leslie, 15, sent me a Facebook message that was its own powerful affirmation of reading's blessedly stubborn allure.
That prompted the most famous newspaper editorial ever written, titled "Is There a Santa Claus?" My favorite full-page holiday advertisement of this year reprinted that powerful affirmation of sentimental spirituality with no commercial message included.
While she differed sharply from Nietzsche on many issues, including rationality, free will, and individual rights, his influence is evident in her provocative, often aphoristic, point-counterpoint writing style, as well as in her "transvaluation" of traditional values and her powerful affirmation of life and joy and the spirit of youth.
