It seems to me, that an being at peace with it self has no need to change or make progress in any direction.
Human actions, and progress seem to originate from various needs we have, and not from a peace of mind.
Enlightenment is having the light within, without darkness. Meditation helps understanding of the problem of inner darkness that we're all born with, but doesn't directly translate into becoming the light.
All forms of unconscious reaction are a sure sign that one has darkness within. Unfortunately, our brains are seemingly hotwired into putting all pieces of information it receives into little pigeon holes of assumption. So, when someone provokes us, we get scared and/or angry, and we then re-act to their actions, making us a slave, not only to our own mind, but to the actions of others.
Learning how to maintain a peaceful composure in all aspects of life is a great way to learn of the battle between light and dark.
Those spiritually inclined can make supplications for assistance to the divine, which personally I find to be of immeasurably great help.
In my experience, this is impossible. Light is defined by darkness. Enlightenment must contain both. Trying to extinguish darkness is doomed to fail
If you're willing to take my word for it: it is possible. I've met those who have radically changed themselves, and have met others who walk the path (& the latter are amazing enough).
Darkness doesn't exist where Light does. It's a matter of sacrificing the darkness for something better.
Remaining staunchly skeptical, distrustful, or scoffing the path is a sure way of not seeing it. It requires objectivity, particularly in spite of one's own prejudices.