New Testament works are not some mindless or heartless act ritually performed to demonstrate obedience, they are evidence of cooperation with grace and of faith and they confer further grace. Faith itself is a work because it is awillful act.
If the only evidence of your conversion is your own proclamation that you are saved then grace is probably running a deficit in you.
Jesus set the bar even higher that just outward keeping of the Law, demanding a right heart attitude.
If the Mosaic Law didn't save because men couldn't keep it, what kind of Jesus do you preach who would make it even more impossible for men to be saved by works and then demand that we do it?