You know in a startup, you only need three people. You need someone who can make something. You need someone who can sell it. And you need someone to collect the money. That's the only three roles in a startup. So which one are you?
Private prayer is like straw scattered here and there: If you set it on fire it makes a lot of little flames. But gather these straws into a bundle and light them, and you get a mighty fire, rising like a column into the sky; public prayer is like that.