"Dealing with backstabbers, there was one thing I learned. They're only powerful when you got your back turned"

In this quote, Eminem is reflecting on his experiences with individuals who have actually betrayed him, also known as "backstabbers." He shares that he has actually found out a valuable lesson from handling these kinds of people. He believes that they just hold power over you when you are not paying attention to them, or when you have your back turned. This could imply that backstabbers grow on secrecy and benefiting from others when they are vulnerable. However, by knowing and keeping your guard up, you can avoid them from having any power over you. Eminem's words work as a suggestion to constantly be cautious and not let your guard down, particularly when dealing with individuals who have shown to be untrustworthy.