No passion so effectually robs the mind of all its powers of acting and reasoning as fear.

The only thing we have to fear is fear itself.

 -Franklin D. Roosevelt, First Inaugural Address (March 4, 1933)

Courage is resistance to fear, mastery of fear — not absence of fear.

 -Mark Twain, Pudd'nhead Wilson, Chapter 12 (1894)

To fear love is to fear life, and those who fear life are already three parts dead.

 -Bertrand Russell, Marriage and Morals Ch. 16 (1929)

You gain strength, courage and confidence by every experience in which you really stop to look fear in the face. You are able to say to yourself, "I lived through this horror. I can take the next thing that comes along."...You must do the thing you think you cannot do.

 -Eleanor Roosevelt, You Learn by Living (1960)

The concessions of the weak are the concessions of fear.

 -Edmund Burke, Second Speech on Conciliation with America. The Thirteen Resolutions (March 22, 1775)

I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

  -Frank Herbert, Dune - Bene Gesserit Litany Against Fear (1965), pg. 8.

Yea, though I walk through the valley of the shadow of death, I will fear no evil; For You are with me; Your rod and Your staff, they comfort me.

 -Psalm 23:4

The LORD is my light and my salvation; Whom shall I fear? The LORD is the strength of my life; Of whom shall I be afraid?

 -Psalm 27:1

God is our refuge and strength, A very present help in trouble. Therefore we will not fear, even though the earth be removed, and though the mountains be carried into the midst of the sea.

 -Psalm 46:1-2

There is no fear in love; but perfect love casts out fear.

 -1 John 4:18

Taken from: http://en.wikiquote.org/wiki/Fear