Jesus Christ died upon the cross at Calvary as the ultimate means of making the possibility of holiness a reality to each of us. If we put our trust in Him and avail ourselves of His grace which He so willingly offers to all (Titus 2:11-13), He gives us the power to become sons of God.
Power -- (ἐξουσία) this is authority or privilege.
With this authority comes responsibility. We have the responsibility as Christians to walk, in this life, above sin. Not only do we have this responsibility but the ability, through His Grace, to do so.
So many in our day would like to redefine "grace" in such a way that it somehow makes God blind to sin, instead of clinging to the Biblical definition, which is that God given attribute that makes men holy, a holiness whose intrinsic nature is to obey God in all things.
Know full well my friends; Jesus will only save those who love Him enough to obey Him! (Hebrews 5:9)
Obey God!
Apprehend Truth!!