Great teammates are secure enough to truly celebrate the success of others. There may be a competitive streak in all of us and that can contribute to internal competition within a team. This is healthy and normal. My level of emotional security is on display when I get out-shined by another. If my first response is “Well done!” then I prove to be secure enough to acknowledge and applaud an achievement outside my own. If my first response is to dismiss the achievement of another, I demonstrate my own insecurity and therefore my deficiency as a true teammate.