Hazrat Ghalib bin Bakr says that if I am asked about the most virtuous person in the mosque, "Do you testify that he is a believer with perfect faith and free from hypocrisy?" then I will not testify, and if I do testify, that testimony would be a testimony that he is in Paradise. If I am asked about the worst person and people say, "Do you testify that he is a complete hypocrite, devoid of faith?" then I will not testify, because if I do testify, that testimony would be that he is in Hell.