According to Newton’s third law of motion “when one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.” Based on this principle, one can conclude that for all cause and effects, every effect must affect the cause.  Therefore when you reap what you sow, what you reap will affect what you sow again.  With this in mind, practicing Karma or the Golden (or even Silver) Rule would seem wise.