Common Saychel: What difference does it make?
The truth is always true, regardless of who speaks it.
The truth is always true, whether it is spoken by a man or a woman.
The truth is always true, whether it is spoken by an adult or a child.
The truth is always true, whether it is spoken by a Jew or a Gentile.
The truth is always true, whether it is spoken by a friend or a stranger.
The truth is always true, whether it is spoken by a tzadik or a rasha.
In the Mishnah, tractate Avot, chapter 4, paragraph 1,
Ben Zoma taught that a wise man learn from EVERY person:
even a woman, even a child, even a Gentile, even a stranger, even a rasha.
Ben Zoma Omer: Aizeh Hu Chacham? HaLomed MiCol Adam.