Every day is a challenge, since we all have different characters and therefore the way we react and think are also different. We should always act courteously, not to put ourselves at the level of others in a discussion and the most important thing is to give the value that each one deserves while maintaining respect.
As you describe it, "they are the working unit of the company" should always be monitored, in that we should not neglect. By showing appreciation and congratulating them when they are doing things well, it is an excellent motivator, which helps work performance. If the managerial job is done correctly, it is easier to make the decision of who and why a worker deserves the promotion.