"Have your own thorn to protect you" One thing a cactus have to protect themselves are their thorn. Same with other things or animals who has their defense mechanism against predator. We people should also need to protect ourself. It can be from danger or other people around us that can be a threat. Those people that might use us and hurt us. Protect yourself from being destroy. Don't let them affect your life and ruin it. Do what you really want and don't let others dictate you. Live your life the way you want it. Always find things that makes you happy. Like a cactus who protect itself and live even they lack on water, be strong, live your life even there are some things that you don't have.