Two things will lead you to supreme understanding. What are those two?
Tranquility and insight.
If you develop tranquility, what benefit can you expect?
Your mind will develop. The benefit of a developed mind is that you are no longer a slave to your impulses.
If you develop insight, what benefit will it bring?
You will find wisdom. And the point of developing wisdom is that it brings you freedom from the blindness of ignorance.
A mind held bound by unconsidered impulse and ignorance can never develop true understanding. But by the way of tranquility and insight…
the mind will know freedom.