Preaching to the choir
The original expression implies that preaching to the converted is a waste of time. After all, why bother marketing to people who are already on the team?
The reality is that the people who aren’t enrolled in the journey are going to ignore you. They’re simply not open to being marketed to, taught, talked at or lectured.
On the other hand, the folks who are in on it have a chance to become members of the choir.
And they are the ones that spread the word. It’s peer-to-peer interaction that shapes our culture, and culture that shapes our world.
The opportunity for anyone seeking to make a change happen is to enlist people who are on a similar path and give them the tools and the motivation to engage with the people around them.
If your work is worth doing, it’s worth preaching to the choir.