Interpretation needed?

'Old men shall dream dreams' (Joel 2:28, quoted in Acts 2:17). Last
night I had a dream (draw your own conclusions). I dreamt that I was in
church, and one of the congregation came up and said, 'Tim, come and see
the thorns in the churchyard. If we don't act soon they'll take over.' I
went outside, and saw a thistle-like plant, except that it was taller
than I was and had seed heads like poppies, ready to scatter seeds
everywhere. I looked around, and saw one that had been there since last
year - it had become a tree, 20 ft tall with a 6 inch trunk and a huge
root system; it would be very hard work to remove. Unless we kept on top
of the thorns as soon as they started growing, they would indeed take
over. And then the dream ended.

The first thought that came into my mind (I must have woken up briefly)
was, 'That was a message. That was about sin. Is there some sin that has
taken root in my life that is going to be difficult to uproot?' But next
morning I remembered the dream and remembered that I had been reading
about the parable of the sower and the seed falling among weeds (I wrote
about this in an earlier blog); and I had been thinking how deeply
rooted the 'weeds' (anxiety, and the deceitfulness of wealth) are in our
culture, even in our church life. Maybe that was what sparked the dream.
But maybe there was a message there: don't let the weeds of life put
down deep roots. We can't stop the seeds landing on the ground and
germinating, but we can stop them growing. Or is there another message?
Or was it merely a dream?