Revelation 12:11 And they overcame him by the blood of the Lamb, by the word of their testimony; and loved not their lives unto the death.
Seven promises are given to the overcomers in the letters to the seven churches of Revelation. ”To the one who conquers I will give….” Jesus is the One who overcomes, and He gives the victory to us who believe. By faith we become Overcomers according to the promise. The promised truth is that nothing will be able to separate us from the love of God in Christ Jesus. We are ”more than conquerors.” He does the work; we just receive the benefits by faith.
In this verse He tells us the who and the how. Who is overcome? Here it is the great dragon and his angels, who have been cast out of heaven to roam and rule the earth by tempting and accusing. But they (the brothers) overcame him (Satan). The Accuser tempts the brothers to sin and then accuses them of the guilt and condemnation of it. But they overcame.
How do we overcome? The promise is that we conquer by the blood of the Lamb. By confession and faith we apply the death of Jesus Christ to our hearts, and the shed blood of Christ forgives and cleanses us from all sin and guilt. The Holy Spirit applies the blood through the gospel, and through that means we overcame. We also speak a word of faith as our testimony to what Christ has done for me. And finally, we overcome by not counting our lives in this world as worth anything, and we are willing to face death rather than give up on our Savior.