For instance, a cockroach is capable of causing serious repercussions in the space-time continuum. E.g., Had Boboy not seen the cockroach in his bathroom causing him to panic and slip and break his head to death, he would have been the only man to discover the cure for mankind's stupidity. And the world we live in from then on would be a stupid-free one. The cockroach, repulsively insignificant as it may seem, is ergo, a vital part in the long and incomprehensible fabric of time. Therefore there are 2 things that we may learn from this concept;
1. Should you be unfortunate enough to see a cockroach, do not ever have second thoughts grabbing your Spartan (or Havaianas if rich) and swat the bastard creature from it's existence.
2. Relax, everything will be ok. What has happened and what will happen hardly matters. For if the most mundane and unconscious of your actions can affect your future drastically, then there is no point in trying too hard to take control of your fate. But it is a fact; that everything will be ok, somehow.