That is a great quote Turkish. I've also heard the saying "you can learn by virtue of others".
I guess my point for us nons is not to be blind going forward
It was Socrates that said "know thyself". He summed up this commitment in the most famous statement of all philosophy: "the unexamined life is not worth living." Philosophers call this the Socratic commitment.
When we look within and learn about who we are there is a side effect that is a welcome one. It is once we know ourselves that we can see things in others, not before.