مُعْتَرِفِينَ ... مُصَدِّقِينَ
Those who profess ... and those who affirm as true.
Profession publicly affirms religion and prophethood; assent is the inward conviction that the Prophet’s established message is true. Both concepts matter to the discussion of religious identity.
Ordinary people cannot know another’s inner state with certainty. Outward judgments concern what is manifest, while hidden realities are left to Allah.