Jesus was born by a virgin and conceived by the holly spirit. My understanding is that it was needed in order for Jesus not to receive the curse all of humanity receives. By Jesus birth he avoided getting a sin nature that all of us have and will always have. However Jesus died for us, so that we now have the power to over come the sin nature through our perfect spirit in Christ. But we still have the sin nature before we were born again we were slaves to it, but through Jesus Christ we now are set free and can over come it. No we can never be fully like Christ because we are born with a curse to our flesh he Jesus was not. He Jesus gave us the power to over come the curse so we now can become more like Christ close but no cigar. This is just my understanding it may be wrong I am not scholar by any means. I seek only the truth.