Learn to say No to customers out of your target, those in your target will learn to say Yes to you.
Imam Hussain is logic for all who listen, but we rarely do. We keep finding sins others own, and 'always' skip our own.
A teacher who teaches corruption, a writer who writes corruptible, is exactly like a photographer who captures corruption, which gladly I'm not any of them.
If I talk emotionally, we'll get to the same result. If I talk logically, we'll get to the same result. If I talk scientifically, we'll get to the same result. That result is Islam.