The lowest point of the pendulum is a stable point, there is order within this point.
If you give it a little push it starts to swing about this low. The more you swing at the right times the higher you come. It's virtually impossible to start swinging to a high point initially, you gotta give a bunch of small pushes.
The highest point of the pendulum is an unstable point, there is order within this point.
Every small mistake will try to pull you down but you must correct and go back to this point, like balancing a broom on your hand. Keep on correcting and it won't fall, but once you do it will--
fall, towards the bottom.
But that's not the entire story.
Because it will zoom right past the bottom back up again, and you can try anew.
However if you miss this one once again it starts to swing lower again.
And again.
Every mistake will add up to returning to this lowest point.
And ever swing will bring you higher towards the highest point.
So what is the right swing?
Only you know.
A pendulum without friction will oscillate for eternity