I could never understand why God would intervene for your alternator when he would not for my sister, or the other families I know who have lost there only children in car accidents, or to cancer.
I can only reduce it to a state of grace and somehow being at the right place at the right time, much like synchronicity, not luck mind you...as luck is associated with blind random chance.
I cannot account for why bad things happen to good people, but I've come to the realisation that some peoples lives are associated with grace, being in tune to the energy of the material as well as the spiritual worlds that make up the substance of our lives, and a benevolent Higher Power.
It's not as if my life is some kind of magical mystery tour, as it were, with all kinds of wonderful things happening in it because it's not. There's suffering enough that exist in my world as well, although not to the degree as personally having cancer, or having a child of mine to die, we all suffer uniquely in different ways.
One day suffering will more readily visit me in it's own format as well, be it on account of myself acquiring some disease or malady, by losing my loved ones in death or maybe even my own life as I have a medical condition which can cause me to lose my life at the hour of sleep.
I just can't answer for what I've not experienced. I don't, however, think that God is an uncaring entity who's as an absentee landlord as he would have to go around and miraculously save any and everyone whoever walks on the earth from harm, as if a genie or even Superman, and where would his measure of saving come to an end?
I don't know why God allowed the victims of the destruction of the World Trade Center to suffer, the Tsunami tragedy, 6,000,000 slaughtered by the Nazi's at the hands of Adolph Hitler, not to mention Mussolini, Jim Jones, Jessie James and you could go on forever to the begining of time. Suffering and evil has and always will on this side of heaven, exist in one form or another, and I'm not making light of your sufferings by no means, because no ones trouble is as great as the one to which it belongs to.
All our troubles are significant in our own way, and unfortunately for some, it worse than others. I however still believe in God's Justice and more importantly, His mercy, which can show up at the most inopportune time. For many of us, it didn't come soon enough, but how we suffer is more important in this world, than why. For me personally, its the learning everyday, how to suffer my troubles correctly, to find a means to get beyond it, that I might continue with the business of living.