People learn by having experiences.One can't get everything right the first time. Mistakes are only natural. So is getting hurt. It's all a part of growing up.
We deserve all the challenges that life throws at us. They make us stronger. You will surmount them. Life has more faith in you than you have in yourself.
When life gives you lemons, don't ask why you didn't get a diamond ring. You make the best goddamn lemonade ever made, turn it into a successful business and then buy the entire diamond store.