“I don’t think you get it, son.” Thomas turned on the young man, with an uncharacteristic amount of bite in his voice.  “If we so much as wave at those beings, we could alter their flow of events in ways you can’t even imagine! You don’t seem to appreciate the ENORMITY the tiniest event can have on the timeline of a universe;  a universe that we were never supposed to visit in the first place!  I, for one, WILL NOT have the devastation of an entire world on my conscience!”  He slashed his hands through the air to illustrate his point.  The young man shrank at the outburst.  