Do you ever think about the impression you make on people?

It has been said that it takes between 3 and 7 seconds until someone gets a first impression from you. Do you ever think about how your impression on people was?
People not always are honest about what they think about you. For me it crazy to think that you can be a hero in someone’s and a villain in others. And that’s not only connected on how you act towards them but how they perceive you as well. For instance there are some people that give a confident and strong vibe but inside they are so damage that they break all the time, they are just good at faking it.
I have met some people that I was amazed by their strength and eventually I saw them breaking and thought to myself that I have never realized how that was just an act. But I do believe that their strength (before I knew that they were damage) encouraged me to act the same way and show that I’m confident.
Do you ever think about the impression you make on people?
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