And the Lord your God will circumcise your heart and the heart of your offspring, so that you will love the Lord your God with all your heart and with all your soul, that you may live. - Deuteronomy 30:6
I don't know exactly how God will circumcise my heart, but I understand that it is the matter of the heart and not the outward "Christian" things we do. Just like what Jesus teaches us. Where the Law says not to murder, Jesus says that hating someone is not different from killing someone. Law could hide your heart. Our hearts don't have to be involved when we deal with Law. God wants us to open our hearts.
circumcision of our hearts =
enables us to love God with all our hearts and souls=
we begin to live (really live)
The enemy wants to destroy and kill, but Jesus came to give us life.