Revelation 12:10
“for the accuser of our brothers is cast down, which accused them before our God day and night”

Satan will accuse believers. He will accuse us of our past sins, flaws and errors. As believers, we can recognize and admit that we have fallen short of God’s standards. That does not give Satan the right to accuse us, because we have not sinned against him, but against God. The precious blood of Jesus Christ can wash away any and all past sins. Would it be Holy blood that Jesus spilled on the cross if it couldn’t?

“I admit that I deserve death and hell, what of it? For I know One who suffered and made satisfaction on my behalf. His name is Jesus Christ, Son of God, and where He is there I shall be also!”

-Martin Luther