"Decisions Determine Destiny."-Thomas S. Monson

By saying decisions will that decisions determine destiny, you are trying to say that all your actions will count towards your future. If you decide to smoke and do drugs in high school, your decisions have lead you to drop put or get expelled. Therefore leaving your without a chance of education. But if you take the correct path and decide to do all your classwork and homework, you have chosen to graduate and possibly go to college or university. Even the smallest decision can impact your life in a  big manner. Think about the quote more closely and see all the decisions you have made and how those decisions have determined who you have become. If you ever did something bad like steal, what was the outcome? Think. You stole something. Even though it might not be of value to anyone. You will still have consequences that could lead you to jail and community service hours. This quote is showing you that anything you do right or wrong will affect you in a strong manner so choose the right path. Don't follow anyone who has made bad decisions. Make your own path if needed. Because you are the one determining your destiny. Therefore the choices you make are making you.
  hard worker equals graduate