From C. F. W. Walther's epic lectures "Law and Gospel; How to Read and Apply the Bible"
"...the essence, of a Christian - that which makes a person a Christian - is that he knows how to seek his salvation in Christ and thus to escape the Law."
Paul says God's law has the power to condemn us because we don't keep it but when Christ died for us He freed us from the law's power. He did this by taking the punishment we deserve for breaking the law upon Himself "Jesus answered them, "Truly, truly, I say to you, everyone who commits sin is a slave to sin... if the Son sets you free, you will be free indeed."