I would say that there is one sure defense against such things: continually meditating and feeding upon God's Word. Let's post some power-verses:
2 Timothy 1:7
“For God hath not given us the spirit of fear; but of power, and of love, and of a
sound mind.”
Psalms 111:10
“The fear of the LORD
is the beginning of wisdom:
a good understanding have all they that do his commandments: his praise endureth for ever.”
Revelation 1:5,6
“And from Jesus Christ,
who is the faithful witness,
and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,”
“And hath
made us kings and priests unto God and his Father; to him
be glory and dominion for ever and ever. Amen.”
Jeremiah 29:11
“For I know the thoughts that I think toward you, saith the LORD, thoughts of peace, and not of evil, to give you an expected end.”
1 Peter 2:9
“But ye
are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you
out of darkness into his marvellous light:”
You are loved and special, held close and dear by the One who matters most!
1 John 3:1
“Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.”
John 15:13
“Greater love hath no man than this, that a man lay down his life for his friends.”
If you are in Christ, you are a winner in the greatest sense possible!