In other words, there is no reason that you cannot do both - live well and invest in your own future, and part of the key to that involves both planning and living within your means
Bolded and underlined for emphasis.
This part requires incredible discipline.
There are many stories of people who acquire sudden wealth, and blow it all, leaving them with - for the sake of argument - nothing.
Financial discipline, in my opinion, needs to be instilled and taught at an early age.
Parents play an absolutely massive role in this development.