No change originates from the outside.
If an obstacle blocks your path and you step over it...
then you were capable of it.
The solution to the problem was already inside you. The inner resources were already available.
Is an obstacle you know how to overcome really an obstacle?
Or is it simply a step?
Difficult, annoying, a delay... but one you handle.
When you don't know how to get past the obstacle, though, that's another matter.
In that case, you have no choice:
You have to transform.
Set the metamorphosis in motion, to go from someone who can't solve the problem to someone who can.
So it really is inner work that's at play.
Even if it draws on the outside, on observation, on interaction, the ultimate goal is to change yourself.
Not the world. Not other people. Not the obstacle.
Yourself.
Tinkering with your inner engine to overcome the problem.
So, to answer the question: "How can we change things?".
Answer: we can't. Not directly.
We can only change ourselves.
Then let it happen.