Why would you keep your enemies closer?

We need enemies in our life. We should close to them. Because they will make you more stronger. Sometimes we are weak, when nothing happend in life. We are so simple. One day, your enemies are coming, you will have to baet them, or dead. Then we find our emergy which we had lost, we do our best for the enemies. After that, we may win, we will fell that we become stronger. At the time, we should thank for the enemies, they make us much stronger that we never have.