Faith

I often wonder at how one can define faith. One simple word but turns your world upside down. Makes you want to believe, put you on the track, be cynic, make a wonderful future, forget past but does it really does all this?
Why is it that something meant for peace has actually caused wars, something meant for faith has led to ill-faith, no answers to it. I keep on my quest to know what it means, if not anything it would make me disbelieve faith. But faith is what helped me be what I am. How can I change that? Let me muse at it and I'll be right back...