In 1915, Wrigley promoted their new spearmint by mailing four sample sticks to each of the 1.5 million addresses in the USA telephone book. Why were they giving out so much? They believed the proof of the pudding was in the eating and there was no way you would eat their gum and not go looking for more. That's how much they believed in their product.
I have found out that no one believes in what you do more than yourself. You are your biggest fan. If you think lowly about yourself or what you do, nobody is going to think highly about you or what you do. Your enthusiasm or pessimism simply rubs off on people around you.
Do you believe enough in your product to give it away persuaded that anyone who uses it will come back for more? God also operates this system. He calls you to experience Him knowing you will ask for more.
Oh taste and see that God is good: Blessed is the man that taketh refuge in him. (Psalms 34:8)