True, our facial expressions are predominately reflections of our inner selves. However, I contend they are also habits.
Recently I have been thinking about my expression as I go throughout the day. As I enter a store I purposely brighten my face. I greet store employees with a smile. I thank the clerk for checking me out and bagging my purchases. Especially if they seem tired or the person in front of me was difficult, I tell that checker they are doing a good job. While walking around the track at the local park, I smile at people I meet or wave at them across the way even if I do not know their names.
I do not project pleasantness perfectly, but what I have noticed is that it makes my daily tasks more enjoyable. I feel more relaxed and happier.
In Thessalonians, instructions are given about how Christians are to treat other Christians. Since I do not know if the strangers I meet are believers, I assume they might be and encourage them anyway as this passage directs.
Therefore encourage one another and build one another up, just as you are doing. 1 Thessalonians 5:11
Another passage instructs us to treat strangers kindly.
Do you have the habit of being a sour-faced, grumpy Christian or do you display the joy of the Lord?
Resolved Day 15: I will say encouraging words to a stranger today.