I have figured them out.

I just discovered the secret of the universe.
Sorry, Sir Isaac Newton but the answer was not in the apple.
It was in the tree.
You see, trees have ever fought gravity.
And they would have won too!
But they have roots that attach them to the ground.
And, well, trees are boring.
At least they find themselves to be.
Standing by each other all their lives long,
And never share a word together.

So this is the plan they came up with:
If ever a human begins to float,
If ever they figure out that they can, and how...
We trees will be so very lonely.
So we ought to hold out our sticks (just in case).
Over their paths is over their heads.
And if one should begin (to float, I mean),
Then surely one of us will catch him!
We will cage in the world.
In a tangled up web of branches and twigs,
And if we let go of the leaves,
We will still not let go of the sticks.

As another precaution,
To slow the progress they could make,
Let's leave them in a daze,
If we can manage, let's take their analysis away.
And when they are walking safely
There beneath us on their path,
If they even dare to look up,
We will paralyze them.
Those people will bump up and down,
As they do when they walk around...
But when they look to a tree, sixty feet up,
The bumping will stop.
And they will feel our still advancement.
THAT IS HOW WE CAN MOVE.

Are we all then agreed?
Keep the people inside.
They must not be allowed to float away,
Up into the skies.