Someone with excellent self-discipline can control how they Act or re-act to something happening to them. someone with diminutive self-discipline can't quiet control how they will react to something said and directed to them.
"Life is 10% what happens and 90% how you react to it"-Some famous person whom I will never meet but my friend said it to me once and it stuck I hope you get something from it as well.
population education is designed to teach children in school about basic population issues and, in many cases, to encourage them eventually to have smaller families.