That’s why we need to be discerning about who we connect with and who we listen to. We can quite literally enhance or damage each other. When we inadvertently allow others to fill our mind with their thinking, we’re at their mercy.

The energy from people’s thoughts is real, and we need to protect ourselves from it if it’s negative, or grab it with both hands if it’s positive.

Thoughts and ideas from other people—including what we hear, read, and watch—have the potential to exert a controlling influence over our thinking, feeling, and choosing, if we let them.

However, it’s interesting to note that memories formed from shared experiences will diminish within 24 to 48 hours because the proteins they’re made of denature. This essentially means that they become heat energy. That’s great for negative experiences, but to maintain and sustain a positive encounter, we need to focus on it for longer periods of time to maintain the benefit.

https://www.mindbodygreen.com/articles/how-your-thoughts-affect-others-from-a-neuroscientist