Four sentences?

1."When you've been deceiving yourself for too long, it's so hard for you to go back to reality."

2."How do you change your life? Just start by changing one bad habit everyday."

3."If you only listen to what you want to hear then you'll never grow up."

4."There's no a single artist who's perfect to me so I have to become an artist so that I can be the perfect artist in my heart."

Are they correct? Can they be simplified?