Justin Bieber clearly tired of all the conjecture regarding why he quit his tour, and took to Instagram to explain last night. He actually started the post with what seemed to be an apology to women he has been in relationships with previously. He said he let bitterness and jealousy run his life. But he then insisted that he was going to learn and grow from his mistakes, instead of feeling shame for them. He then moved on to explain why he dropped out of the tour, saying it was all about being sustainable. Sustaining his career AND his heart and soul. He needs the break to take time to grow into the man he should be. He ended by saying that he didn't expect people to understand, but at least everyone would know where he was coming from.