Jesus likens the kingdom to a weed. (The mustard seed grows into a weed.) So the kingdom isn't the project you are doing in the shed, it is to be found behind the shed in the unkempt part of the yard not usually visible from where all the action is happening. That's funny. It must have provoked at least a little snigger amongst some, while others may have been a little offended.
These days it is difficult to find someone in the church who doesn't recognise the danger of identifying our pet projects with the kingdom. We know that when we give our hearts to pet projects (that is, the pet project becomes an idol, displacing the kingdom from its place of honour in our hearts), all kinds of problems and disasters occur. Idols always distort those who worship the idol and the outcomes.
If avoiding making our pet projects into idols were as easy to say as do, I suppose human history would look significantly different to what it actually does. And this isn't just for religious people. Pet projects become ideologies, driving adherents to say and do all sorts of crazy stuff. Like any idol.
And this is why the parable of the mustard seed is so helpful. It's a warning against pet projects. Even when we think the pet project is the kingdom. Even when the pet project begins in kingdom-type activity. It's just too easy to equate what we are doing and thinking with the kingdom. We all decry the empire-building of yesteryear but are happy enough to think that when we act justly or evangelise (or whatever it is your church tradition values in particular) that we are doing God's work. Well, yes, possibly. But it is a slippery slope, and is why history looks like it does.
I could just say, let's hang loose people. Let's not invest too much in our pet projects. But how to give (of self) genuinely and hang loose? How to avoid becoming tepid? (Neither hot nor cold, see Revelation 3:16.) Well, keep looking behind the shed. That's the point of the parable, or at least part of it. Keep looking behind the shed. And when we do, and we see the weeds growing, let the weeds take your interest for a while. We can divide our attention, which is a good, practical way to get our hearts off the pet project and (at least potential) idol in the shed. God is doing all kinds of stuff, not just our pet project. It might be time to move on from the pet project. The kingdom requires nimbleness.
Here is a parallel from the Christian tradition. People hunger for spiritual experiences. Christians have always hungered for spiritual experiences, and when an 'experience' is granted, hang on to the experience. And not just Christians, it seems that many contemporary people are hungering for 'spiritual' experiences, although who knows exactly what the world thinks it means by 'spiritual'. Anyway, the advice from the Christian tradition is not to hang onto the experience. The experience may well be helpful, but hang onto it and it will become less and less helpful until it has the opposite effect. Kind of like how the pet project can become an idol. The advice is to just go back to praying, like normal, and leave behind the experience. The experience has done what it was meant to do. Move on. And that is part of the problem with seeking a 'spiritual experience', it feels like it is helping us grow, but it will actually stop us from moving and growing in a relatively short space of time.
Or another parallel. In the Christian tradition, God is more unlike than like any image or thought we have of God. Words and images have the tendency to become replacements for God, that is, idols. Or, less dramatic, prevent us from continuing our journey into and with God. We get stuck. Just like spiritual experiences, we can get stuck. Just like pet projects. We can get stuck. The kingdom is moving on, let's keep looking, moving, joining, looking, moving ...
