In my eyes, one of the most crucial concepts in life that tremendously improves social interactions.
Learning how to express their own feeling without intentionally hurting other persons' feelings.
When both sides are interested in building a social relationship, all problems can be resolved.
But understanding that in a relationship, usually, people take other people as they are, without trying to mold them into a different person.
I always try first to respect people as they are and emphasize what I see as good in them.
Having a change intervention should happen rarely. If it becomes the norm in a relationship, maybe it is better to walk away - for both sides.