It comes from the likes of you! Take what you can get! Grab the chances as they come along! Act in hallways! Sing in doorways! Dance in cellars!
That's the beautiful thing about being an artist, is you can take risks and take chances and hopefully be secure enough to just keep going with it if you fall flat on your face.
And, of course, millions of us cross the border to work in US homes and gardens and factories and carpentry shops and restaurants, and if you go to a restaurant pretty much anywhere in the United States, the chances are that the dishes will be washed by a Mexican.
In Spain, you get seven clear chances a game to receive the ball and shoot. In Italy, you get very few clear balls, and you have to fight everyone to score; that makes you improve and develop.
I will be honest, and I have no shame in saying that after 'Kai Po Che!', I did not get chances. Some people didn't understand what to give me, and some people went out of the way to not give me work.
Just because you're struggling with self-discipline doesn't mean you have to raise the white flag and declare your self-improvement efforts a complete failure. Instead, work to increase the chances that you'll stick to your healthier habits - even when you don't feel like it.