You need to be honest. People around you, whether they like it or not, need to hear your opinion, thoughts, and judgments. They don’t need to like what you have to say, because this is not the point. The whole point is that you get it out. Suppressed words will only be detrimental to you. It could manifest into a sickness or a long-term resentment. You’ll have to let go of any expectations as well. What you say may cause the reaction you have hoped for, but things could easily stay the same.
Mercury in Sagittarius: Communicate the truth.
SIMPLY PUT: Be real.