what is there to know?  still broken from years gone past.  knowing that growth from and to and beyond is nothing more than a farce upon past actions.  life is a flow.  a linear path.  no one changes.  not one thing to make a life a better place.  if one never leaves comfort.  no risk equates no reward.  the first lesson is the representation of numbers.  then simple arithmetic. then it builds.  and it can get so far as calculus for the rare few.  but many stop at algebra.  and that's even too much sometimes.  linear equates growth.  but the base is still present.  always.  and if that base was broken during building.  sometimes one has to go back and rebuild.