In an environment of challenge and growth, people must try things they've never done before. And they will make mistakes. In a healthy and rewarding culture, people must be encouraged to learn from their mistakes, then quickly regroup and rebuild. Managers should work with employees to understand, rectify and improve. Together they should attack the problems, and not the people involved.
Many companies have rituals for sharing success and achievements, and that's good.
But it's the mistake no one hears about, and others blindly repeat, that can pull your ship to the bottom. These quotes are the recipes for disaster. Explain what you learned from the experience. Then ask others for their ideas and input, listen for feedback, and thank those who offer their opinions. You will demonstrate a willingness to learn together, and encourage an open culture of sharing and communication.