( Hakim Tirmidhi ) الخلق وعاء الدين
[The creation (human beings) are containers of the religion.]
Is the hadith reliable ?
According to Suyuti in al Jami al Saghir, yes. In addition its meaning is confirmed by established proofs, among them the sound sahih hadiths: “I was sent for nothing other than to complete good character” and “People are vessels: the best of them in the time of ignorance are the best of them in Islam when they understand.”
And Allah knows best.
Hajj Gibril Haddad