If you are not setting high expectations for your team, don’t be surprised if the delivered work is mediocre. If you set a high bar, it challenges people and pushes them to perform better and exceed expectations. However, it is important for you to show high confidence in them and they’ll rise up to that level.
The Law of Expectations: People respond to the level of confidence you show in them—expectations are a ceiling on performance, not a floor.
The Feiner Points of Leadership by Michael Feiner