I agree, tanzanos, that there are sections of the Bible that bother me, the parts where men kill women and children when possessing a promised piece of land.
But, the truth is, what I've gained most from the old testament is the consistent pattern, the constant theme of how different our lives our when we trust fully in God as opposed to trusting in earthly promises (revealed most in those days by pagan practices that today would be something like playing the lottery, then knocking on wood, throwing salt over ones shoulders, or giving money or things to a church out of fear one will be impoverished.) If the chosen people were trusting in God, if their leader was a godly leader who encouraged the people to trust in God, this pleased him, and they're lives went well.
I do believe when we seek our daily comforts in other ways, when we act out of fear of the unknown future (something that is increasingly becoming a challenge in today's unstable economy), especially when those actions lead us towards greed, fear, lying, stealing, and perhaps worst of all: cheating others on the hopes for our own gain, then I believe we walk away from his favor. It's not that he then sends a lightning bolt down on us, because we rejected him. To me, it's more that we walk away from that which he wants us to take, but we must first have faith in him, before he will bestow the blessings on us.
This is the kind of thing I couldn't understand until I began walking in faith. I think it's one of those things we can only truly understand by God's grace.