you outer environment is a reflection of your inner environment. if you have peace in you, peace will exude you. thats how you change environments just by walking into the room. its the Spirit leaving you, trying to find if there is fertile soil for it to land on and if there isnt, it will return to you. Its like the story of Noah, when he sent out the dove to find dry land and it returned and so he took the dove back into him (the dove being the Holy Spirit, not a bird).

do you want to be able to walk into a room full of chaos and just your presence calms it down? i know i sure do