The mustard seed represents the movement. Back then mustard seed was like a weed, it grew everywhere and was hard to get rid of.
This is one of a few different possible meanings in context the bible will not teach you on its own.
https://en.wikipedia.org/wiki/Parable_of_the_Mustard_Seed
Some have identified a "subversive and scandalous"
[6] element to this parable, in that the fast-growing nature of the mustard plant makes it a "malignant weed"
[6] with "dangerous takeover properties".
[6] Pliny the Elder, in his
Natural History (published around AD 78) writes that "mustard… is extremely beneficial for the health. It grows entirely wild, though it is improved by being transplanted: but on the other hand when it has once been sown it is scarcely possible to get the place free of it, as the seed when it falls germinates at once."
[9]
OR
Ben Witherington notes that Jesus could have chosen a genuine tree for the parable, and that the mustard plant demonstrates that "Though the dominion appeared small like a seed during Jesus' ministry, it would inexorably grow into something large and firmly rooted, which some would find shelter in and others would find obnoxious and try to root out."
[7]
We can both agree that a seed is some form of birth to a network of something. It is planted and grows into something. It replicates and spreads.
By reading your response, you have planted seeds into my mind. I have taken in your thoughts and words. I can find shelter in those or I can find them obnoxious. I would say that certain thoughts and knowledge would be seeds that are firmly rooted.
If someone said to me, "the end of the world is coming," That seed has been planted into my mind. I can quickly destroy or ignore that seed and realize how silly it is, or I can actually believe it, dwell on it, and let it take growth, allow it to grow wild with dangerous takeover properties. Next thing I know, I'd be conditioned and convinced and firmly rooted... and spreading those seeds into more and more minds.
In my case, I'll see it as a tree of knowledge. Knowledge resides in the brain. In current neuroscience, a tree/branches/roots can be seen as dendrites, nerves, etc. carrying light across synapses of neurons and cells.
Dendrites (from
Greek δένδρον
déndron, "tree") (also
dendron) are the branched projections of a
neuron that act to propagate the
electrochemical stimulation received from other neural cells to the cell body, or
soma, of the neuron from which the dendrites project.
Heaven being a state of peace, happiness, and bliss. We know that we can only experience and know peace and bliss from within. None of our knowledge and experiences exist outside of us.
I would say that any knowledge and revelation would be simultaneous. Knowledge revealed within ones brain/mind. Something they never knew before they now know. Obviously, some negative seeds are planted and grow rapidly and dangerously. Positive seeds are planted and grow rapidly and peacefully.
If it's a problem between thousands of years ago and now, human's still experienced peace or suffering back then too. If it's a problem of knowledge back then and now, parables of seeds/branches/roots/trees have now been more modernly revealed as the brain and minds network of knowledge/knowing. Modern knowledge has been revealed into our brains and minds.
I would also just simply see birds of the heavens as thoughts of peace.