the main cause of the spirit of fear...

...self - self-love, self-concern, self-protection.

There is only one way to get rid of self, and that is that you should become so absorbed in someone or something else that you have no time to think about yourself. Thank God, the Spirit of God makes that possible...

What then? Go on to think of the love of the Son in its breadth, its length, it depth, its height; go on to know the love of Christ which surpasses knowledge. Think of Him who came from the Courts of Heaven and laid aside the insignia of His eternal glory and was born as a babe, worked as a carpenter and endured the contradiction of sinners against Himself. Think of Him into whose holy face men spat and on whose brow they pressed a crown of thorns and into whose hands and feet the nails were hammered. There He is on the Cross. What is He doing there? There He died for us, that you and I might be forgiven and reconciled to God. Think of His love, and as you come to know something about it, you will forget yourself.

- Martin Lloyd-Jones