The phrase "assert their beliefs" is correct and usable in written English.
It can be used when discussing the act of confidently stating or declaring one's beliefs or opinions.
Example: "In the debate, each participant was encouraged to assert their beliefs clearly and respectfully."
Alternatives: "state their convictions" or "declare their views".
They are eager to assert their belief in "American exceptionalism," while at the same time describing in vivid detail the gloomy conditions under which voters suffer every day.
It is merely evidence that someone, when in possession of a spray can, wished to assert their belief in the millionaire former premier's mendacity.
More than 100,000 people joined spontaneous demonstrations in Paris and 100 other towns and cities on Wednesday night – not to insult Muslims or call for police repression but to assert their belief in the French "republican values" of openness, freedom and decency.
The two men have personal profiles so closely parallel to that of Osama bin Laden, whom the Federal Bureau of Investigation is seeking on terror charges, that Yemeni investigators have repeatedly asserted their belief in Mr. bin Laden's indirect involvement.
Meanwhile, under the banner of arte concreta a group of São Paulo artists were asserting their belief in the raw, mechanical power of the abstract image; and in Rio de Janeiro, the neo-concrete movement – including Oiticica, Lygia Clark and Lygia Pape – were establishing their own, more emotive version of abstraction.
Although this policy would be continually debated, the argument was persuasive - the women only nature of the peace camp gave women space to express their beliefs and assert their politics in their own names and traditions without the customary dominance of men.
Back in February, when he heard me discussing Arizona Senate Bill 1062 -- the one that almost became law, the one that would have allowed businesses that asserted their religious beliefs to deny service to gay and lesbian customers, James asked what that meant.
Individuals asserting their own values and beliefs seek control over important decisions in their lives, especially healthcare decisions.
One key issue before the justices is whether profit-making corporations may assert religious beliefs under the 1993 religious freedom law or the First Amendment provision guaranteeing Americans the right to believe and worship as they choose.
Indeed, the social function might be all the better served if those making moral judgments firmly believe in objective values and assert those beliefs, even if they are in fact making a projective error in doing so, as error theorists claim.
