Tears are a small but special representation that there is still a soul inside that needs to escape. When your time has come the tears will stop flowing because the soul has escaped. When the soul has escaped a lifeless she is created. A lifeless shell is something we all turn to in the end. Having no more tears means having no more soul.
And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away. - Revelation 21:4
this is how i felt when my sailor walked away from me to leave for deployment....but you just have to stay strong and wave and smile and turn your head so he doesnt see the tears running down your cheek so he doesnt say hes sorry because you know he cant help it and you may need him but his country needs him more right now.