Say less to say more.
Not only is this proven in public speaking workshops, where it is often emphasised, to have a strong open, a strong close and no more than 3-4 key points, because that's all that people remember, but I experience this in every day life.
Being an observer, remaining silent, active listening does not mean you are less intelligent, less informed or weak, rather allows you to fully receive what the speaker is saying, without an agenda, without reacting, instead learning.
If you listen you will learn, you will grow and you will develop far more than someone who is trying to fill the space with their voice, pushing their views, stuck in their ways or trying to win at all costs. "If you think you know everything, you are not listening"- Marsha Johnson Evans.
Some argue that by the time we reach our mid 30's our personality is largely a collection of memorised thoughts, beliefs, attitudes... If this is true, I want to learn as much as I can, I want to maintain a growth mindset, a beginners mind, learning from all sources, people, and life experiences. To do this, you need to get comfortable in the NOT knowing, in NOT always filling the space.
In the practice of our days, to listen is to lean in, softly, with a willingness to be changed by what we hear. --Mark Nepo