The phrase "affirmed belief" is correct and usable in written English.
It can be used to describe a belief that has been confirmed or strongly held, often in a context of discussion or argumentation.
Example: "Her affirmed belief in the importance of education motivated her to pursue a career in teaching."
Alternatives: "confirmed belief" or "strongly held belief".
The Jesuits affirmed "belief in a God who is justice because he is love".
It focuses on "the three Abrahamic religions" — Judaism, Christianity and Islam — each of which takes as a forebear an "itinerant herdsman" of the Middle East, Abraham, who affirmed belief in a single God.
Al-Ashʿarī's harmonization also produced a simple creed, which expressed faith in God, his angels, and his books, and affirmed belief in Muhammad as God's last messenger and in the reality of death, physical resurrection, the Last Judgment, and heaven and hell.
And Francis's remarks don't constitute any change in doctrine: In 2012, the Vatican's chief astronomer affirmed belief in the Big Bang and evolution was compatible with the Catholic faith.
Our findings indicate high levels of subscription to negative beliefs about condoms, with two out of three respondents affirming belief in at least one negative condom rumor.
For these reasons, one would be hard pressed to find very many theists (as opposed to deists) who do not also affirm belief in an afterlife.
All students must sign a "Statement of Faith" before they arrive, affirming belief in what the college considers core Christian doctrines.
Even among those who are current "temple recommend" holders (a subgroup of active Mormons who pass an interview with an ecclesiastical leader in which the individual is required to affirm belief in core Mormon doctrines, about 52% of all Mormons), 4% expressed at least a degree of doubt in LDS church teachings.
Her work with Rove, she told me, affirmed her belief that he was a political genius.
Nasrallah has repeatedly affirmed his belief that the Assad regime will survive.
In the letter, Mr. Meriwether affirmed his belief in the trades his firm had made.
