The passage says, “For as many as are of the works of the law are under a curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them.” (Galatians 3:10)
So the curse of repeated sin can be seen as being under a curse because you continue in doing what God has told you not to do and yet you will not stop breaking His law. This is why we need to understand that sin is more than just what we think or say but also includes our actions as well! If we continue doing things that God has said we should not do then this puts us under a curse!
Persecution Live 