I think these two things have been mixed up. I don't think they are the same at all unless casting lots is used as a form of gambling. Let me explain what I am trying to say... Gambling is an attempt to get something for very, very little: a nickle turns into a couple of hundred dollars at the pull of a lever, or a series of numbers you bet on for a dollar yields a million or so of the things. This is gambling. It is 'investing' extremely little (at least at any one time) on the chance that you will get an enormous return. It is a form of greed. Casting lots, unless it is used to gamble in terms of money or prizes or such, is not a form of greed. In the case of Jonah, for instance, it was a request for some higher power to provide an answer. In the case of the disciples trying to choose a replacement, it was trying to get God to choose between two THEY had already selected. In Jonah's case, all possible options were presented and in the case of the disciples only two were (and God had a third). However, in both of these cases, the implied request is that God choose. This is not gambling. At its most sublime, it could be considered a form of prayer. It is not asking for something for 'nothing', but rather that a choice be made by someone other than self, and far more knowledgeable than self, among options which have presented themselves or been selected somehow. Does that make sense? Therefore it is safe to say, at least in my mind, that while gambling -- being a form of greed and involved with enormous waste of resources -- is a sin. It is the sin of not trusting God, actually, with one's life. Casting lots, however, as we see it in the Bible, is not this at all, but rather a form of trusting God. So I see the two as very, very different.