Every time someone tries to draw a circle to keep folks out, God will draw the circle even wider to take them in.
When you take your life in a new direction, people will notice. When you show up at a party and no longer belly up to the bar. When you go to your book club and forego the bon bons. When give up the remote control and put on your running shoes. When you stop shopping for entertainment and start serving at the soup kitchen. When you quit talk radio and talk to God instead. When you no longer complain to your friends about your boss or your ex. You won't need to wear sackcloth. We'll all know you are fasting, and God will know it, too.
Not unlike his first birth, Jonah's rebirth was a messy affair. Ours can be, too. I can tell you that it won't come at a convenient time. Jesus won't come when your house is clean, when all your affairs are in order. Jesus will get into your life when you can't get out of it.