I really like the saying, "Along the way, there are no enemies, only teachers."

It's good to be straightforward about love and hate, and to be clear about likes and dislikes, but there's no need to ride the wave or take advantage of opportunities to step on others.
People should have principles, which can be based on understanding or speaking up for their holdings.
Both good and bad should be pointed out; no one will make things difficult for sincere people.
In the end, using others as a mirror, at its core, is about one's own cultivation.