The phrase "unshakeable conviction" means having a strong belief or certainty in something that cannot be changed or doubted easily. It refers to a firm and unwavering belief or confidence in a particular idea, principle, or belief. Full definition
They stand several generations apart but are driven by the same unshakeable conviction in education as a fundamental human right that should be enjoyed by every child, regardless of their circumstances. (globaleducationmagazine.com)
The exceptional courage and unshakeable conviction exhibited by women martyrs had been documented before the time of Tertullian. (religion-online.org)
[23] The exceptional courage and unshakeable conviction exhibited by women martyrs had been documented before the time of Tertullian. (religion-online.org)