What stops the Devil from extensively manipulating Christians from a Biblical perspective?

Research shows that human beings can be pretty easily manipulated . This manipulation can be effectively done by ordinary humans with no special powers. Why, then, is Devil (who is generally believed to be a better manipulator than an average human) so impotent at his evil deeds? Why doesn't he manipulate humans into doing something sinful, or just something that will lead towards sin later down the line? Is there a Biblical answer to these questions?