I have already covered this in several different hubs I've written. Is it always the same? No and it never can be always the same because Life itself is ever changing, which is addressed in the hubs I've written on the topic. Situations and circumstances will seem similar, but won't be exactly the same. My hub- "Is Life Complicated" makes it very clear and explains almost everything one would need to know, except for a scientific explanation. This isn't a scientific question, but more of a philosophical question, which is how I addressed it.