Hello and welcome!
Growing up, I think, is learning to endure the pain that comes from deferred gratification.
When young, our thoughts race only towards things that bring us immediate pleasures. Since we're still unable to handle life on our own - we rely on our parents - not getting exactly what we need seems like a direct threat to our existence.
With age, we learn to wait. To postpone what's immediately available in front of us with the intention to reap bigger rewards later - the most basic example is interrupting your pleasant dream at the exact same time every day so you can get up, go to work, and get paid.
This sensation, however, is extremely hard to block at our current age.
You are, quite literally, just a click away from watching a fun show or ordering something you don't necessarily need with money you don't (usually) have.
Even if you're extremely busy and if you're really interested in what you're currently doing. There is this nagging feeling that continuously checks your level of happiness and attempts to make you do less work and have more fun.
I mean, we deserve a medal for every time we say no to watching videos so we can focus on our work.
In the most recent book I've read, this concept is represented as having vs being.
We aim to obtain more things and we tie having more things to who we are - thinking that the more we have means that we are more. But the opposite - being - is what we need. Not possessing more, but focusing on practicing productive activities. Plainly, creating things and being content with the work we do, not with the stuff we own.
The book I'm talking about is the not-so-popular The Art of Being by Erich Fromm.
It's amazing that a book that was published in 1989 so adequately represents our current turbulent times.
You can check my summary here where I cover the key lessons from the text (the full text is for members-only) and/or read the book itself - it's amazing!