Romans 9:1-3

Romans 9:1-3 (KJV)
1 I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost,
2 That I have great heaviness and continual sorrow in my heart.
3 For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh:

Romans 9:13-15

Romans 9:13-15 (KJV)
13 As it is written, Jacob have I loved, but Esau have I hated.
14 What shall we say then? Is there unrighteousness with God? God forbid.
15 For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.

Child Of Flesh Or Child Of God

It is the children of God that God has mercy upon. Those that call upon the Name of Jesus and do what He says will be found worthy.