Random ramblings

Do we really understand the significance of things in life? Could it be that one moment that seemed entirely insignificant could then go on to shape the rest of your life? A split second decision that you didn't think made any difference changed everything for you...and perhaps you don't even realize it? Is that fate? Or just random coincidences? Do parallel dimensions get constantly created every time you make a decision...if so then wouldn't it be interesting to see the effect of those decisions?