Luke 22:31-32.   And the Lord said, Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat: But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren. Eph 6:16.   Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked. 1 John 5:4-5.   For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?