How do we know that we are dead to sin?

According to Romans 6:11, believers are called to reckon themselves dead indeed unto sin, based on the understanding that Christ's death has rendered them free from sin's dominion. This process of reckoning involves recognizing our identity in Christ and the power we have through His resurrection. Because of His work, we can yield ourselves as instruments of righteousness rather than instruments of unrighteousness. This truth grants us the assurance that sin shall not have dominion over us as we are under grace.