I think I see your point, David, about the celestial bodies. I think that what you say is that there has been no randomness in the way the universe has been expanding since the BB. You would probably say that when an asteroid hits a planet like earth, this hit was predetermined from the beginning: the trajectories of both were on a collision course since the beginning, right?

But then, you extend this reasoning to a human life. Although an asteroid and a human being are both made of energy, a human has intent. I am not saying that an asteroid does not have intent, but whatever is the case, I am going to risk saying that a human has more. Enough to change his/her destiny. Destiny, in my opinion, is a choice that a person/animal makes before incarnating, a choice of encountering some situations that will force us to learn specific soul lessons. But a person who is very aware of his/her learning curve can bypass the learning situations and go directly to the essence of the lesson with the power of intent and awareness. In the same way that I believe that pain is simply a learning tool, I believe that a person who is well aware can learn without the presence of pain (the way, for example, that some artists bring awareness out of the chaos of unconscious contents). So, yes, some events are predetermined but the human mind (and I am not excluding the mind of some very evolved animals) can bypass them/change them.