1. David knew who he was. 1 Samuel 17:10 (NLT) I defy the armies of Israel today! Send me a man who will fight me!" 9 If he kills me, then we will be your slaves. But if I kill him, you will be our slaves! 1 Samuel 17:26 (NKJV) Then David spoke to the men who stood by him, saying, "What shall be done for the man who kills this Philistine and takes away the reproach from Israel? For who [is] this uncircumcised Philistine, that he should defy the armies of the living God?" Romans 2:29 (NLT) No, a true Jew is one whose heart is right with God. And true circumcision is not merely obeying the letter of the law; rather, it is a change of heart produced by God's Spirit.