Abu Hurairah (May Allah be pleased with him) said

The Messenger of Allah (ﷺ) said, "People are like ores. Those who were excellent in the Days of Ignorance are excellent in Islam provided they acquire the knowledge and understanding of the religion. You will find the best people in it (Islam) those who had a deep hatred (for leadership). You will find the worst among the people a double-faced person who appears to some people with one face and to others with another face."

[Al-Bukhari and Muslim].