Everything. Your highs. Your lows. Your happiest moments and the most painful ones. Your failures and your successes. Your losses and your gains. Just remember -people can't come in and out of your life for no reason. The lessons you learn and the growth that you experience is never spontaneous. It's always meant to be. There's a higher purpose. A goal. A final destination, or a peak in your journey that you will have no idea of until you reach it. But for that you need to climb the mountain. For that you need to look for a deeper meaning. For that you need to pay attention to everything and everyone around you, especially those that love you and leave you. There are some lessons that only people and their existence can give you. There are some lessons that only pain can bring out. There are some lessons that the biggest joys of your life will reveal to you. And there are some lessons that you never knew were lessons until they walked out of your life. Think about it -only then will you stop treating your growth as an accident and start appreciating it as the most beautiful journey created just for you.