The phrase "affirmed themselves" is correct and usable in written English.
It can be used when discussing individuals or groups who have validated or confirmed their own identity, beliefs, or worth.
Example: "Through their actions and words, the activists affirmed themselves as leaders in the community."
Alternatives: "validated themselves" or "asserted their identity".
Aboriginal descent became a matter of pride, and by the early 21st century the number affirming themselves to be Aboriginal was some half million.
Here the terror is an end in itself and those who use it to express and affirm themselves become addicted to it.
And this task of self-authoring becomes, for Nietzsche, a tremendous spiritual displacement, entirely atheistic of course, but one which tasks the individual with designing and affirming themselves with no reference to others.
Even more, perhaps, because women with serious psychological or physical health issues – such as obesity, as well as anorexia and bulimia – are drawn to yoga to affirm themselves, regardless of their "looks" or how they might feel about their bodies.
These forces affirm themselves, and thereby differentiate themselves first, and only secondarily consider that from which they have differentiated themselves.
In this case, development assistance represents the means for smaller countries to affirm themselves as members of the international community.
The obvious consequence of these rules is that, with the only exception of insolubilia, which are called false not because they signify the false, but because they affirm themselves to be false or not to be true, all the other kinds of proposition are true if and only if what they signify is true, and false if and only if what they signify is false (ibidem, p. 64).
Meanwhile, Jews played into National Democratic rhetoric by affirming themselves as alien through their participation in exclusively Jewish organizations such as the Bund and the Zionist movement.
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It's also clear that the people who perpetrate deep down feel quite worthless and feel they need to affirm themselves.
