If karma is "what goes around, comes around." And then that is based of what someone does in that moment. For example if someone throws book at a wall, and they were not trying to break that wall but end up breaking that wall anyway, that is karma. Karma is the direct result of someone doing or saying something that in turn gave them something good or bad. Now, comparing that to destiny which is predetermined at birth per-say; it is not entirely based on what you do or say. If someone knew what their destiny was and wanted to change it, in theory they could try to change some things about it. But overall that destiny would not change, those smaller changes would only speed up or slow down the coming of their destiny. This is because of the predetermined end result to your destiny, only, it would be realized at a different time. You could say that destiny and karma are similar in the fact that they are both predetermined, or in the sense that there is a beginning action and an end result. Here is also where that similarity ends; karma doesn't have extra actions that aid in the end result. This is due to the fact that karma applies to everyone in the universe equally, there's either a punishment or a reward for what you do. Destiny on the other hand applies to each person differently, and depending on what destiny pre-dates, you either become something great, or something not so great.
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