Proverbs 15:30 A cheerful look brings joy to the heart; Psalm 126:2-3 Then our mouth was filled with laughter, and our tongue with shouts of joy; then they said among the nations, “The LORD has done great things for them.” The LORD has done great things for us; we are glad.
Job 9:27 If I say, ‘I will forget my complaint,I will change my expression, and smile,’
Being a believer means that we should possess that content joy that the world doesn't have. Will life be easy? No. Will we always "feel" happy? No. But put a smile on your face! Joy is a fruit of the spirit that we are to possess, and that is something that comes from Him, not our circumstances.
Our good friend, George always says that he wants to tell people "So, you're a Christian? Why don't you tell your face?". Always makes us laugh, but it's so true. When you are unkind or stand~offish, or won't speak to others around you, even other believers, you have no light to shine. Always smile and act like the woman of kindness and grace that we are instructed to be. None of us are perfect, or always have a good day, but we can always greet each other with a smile and a "Hello" ~ it really isn't that difficult.
Remember who you are in Christ and what He has done for you. That gives us the biggest reason in the world to smile and be kind to everyone around us.