This is so true. For everyone interested in I absolutely recommend reading Awaken the Giant Within from Tony Robbins. It taught me exactly that you and ONLY YOU control your own thoughts and feelings. Don't make any excuses. If you do READ THIS BOOK.
Check out the book (I actually just wrote about it): https://steemit.com/book/@mariusschober/if-you-could-only-read-one-book-in-your-life-read-this-one