A man can only achieve so many things in their lifetime. The curse however is that we want it all. From success to innovation to a loving family to an empire to exploration to enlightenment whatever you can imagine and want.
But most of us won't achieve all those things or any at all.
Success is of course different for each individual. Maybe a loving wife, a good-paying 9-5 job, two good children is all you need. That is probably what most people want especially when to come from more unfortunate backgrounds.
But to even achieve that you need boundaries. You can't have a loving family when your work keeps interrupting family time. You can't build your career when you need to 24/7 take care of your family. You can't be at peace when anything can interrupt you during your rest.
You need boundaries.
Set them and don't let anyone cross over it.
If they do cross it, punish yourself for not even upholding your own boundaries and rules.
Without boundaries, you can't map out your life. Without a map, you don't know where you are going.