Attending a course for those on unemployment benefits, I watched a young artistic lad (whom I had come to learn over the weeks was a committed Christian) shrivel when shouted at one day, for 'doodling' art work as the lecturer was speaking. To be fair, the instructor did apologise to him after, as it had been rather demeaning, & 'Ben' had shown himself to be interested and involved & was not what you would call a 'slacker'.
As Christians, we need to be very aware of the power of our words, to wound or heal those on the recieving end. As Scripture says in Proverbs 18:21 the tongue holds the power of death & life!