It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: People are like hidden treasures (mines). You will find that those among them who were the best in the time of ignorance are also the best in the time of Islam, provided they become learned in religion. And you will find the best person in this matter to be the one who was honorable even before entering this religion. And among the people, the worst person you will find is the one who is two-faced, coming to some people with one face and to others with another face.