Why The Need For Christ’s Sacrifice!

Question!

Can one called of God actually qualify by their works and righteousness to be worthy to enter into the Kingdom of God? Can anyone else by their badgering, emotional and spiritual blackmail or threats or harassment with the Word of God drag you into the Kingdom of God? Can works of the law save you? And what does it mean; to be saved by faith? And if by faith one is saved, do we need any works of the law(love), and if we do, why if we are saved by grace?