Does Matthew 5:38-40 mean we have to remain pacifist?

In Matthew 5:38-40 Jesus Christ tells us that if someone hit you on the right check that you the other check to him also, does this means as Christians that we are supposed to remain pacifist and that we are not allowed to fight back if somebody attempts to attack us? Because in Matthew 5:38-40 Christ says: > 38 Ye have heard that it hath been said, An eye for an eye, and a > tooth for a tooth: > > 39 But I say unto you, That ye resist not evil: but whosoever shall > smite thee on thy right cheek, turn to him the other also. > > 40 And if any man will sue thee at the law, and take away thy coat, > let him have thy cloak also.