Fear
The most dangerous things of all.Everything you pursue will be gone in a moment,if this four-letter wave sweeps across you at that precise time. It's happened with me so many times that now I fear the 'fear'.Renders my brain useless and reminds me of my inability to control my own mind. Some may call it 'fate',but (like Neo in Matrix) I don't like the idea of someone/something else controlling my life. That's when people look upto their faith. It is so beautifully intertwined.