to make you stronger and wiser than you were before.how? because goodbyes and griefs brings you heartaches and pain and make you cry. but eventually you will move on from it and think that you have to get yourself together. because you've already learned that being hurt in this world is inevitable, there will really come a time where you have to experience those things, but these things will benefit you in the future making you wiser. because you know now to whom are you going to give the power to hurt you.