"My final test may be the most restrictive. Do you actually want to start a startup? What it amounts to, economically, is compressing your working life into the smallest possible space. Instead of working at an ordinary rate for 40 years, you work like hell for four. And maybe end up with nothing-- though in that case it probably won't take four years."

"During this time you'll do little but work, because when you're not working, your competitors will be. My only leisure activities were running, which I needed to do to keep working anyway, and about fifteen minutes of reading a night. I had a girlfriend for a total of two months during that three year period. Every couple weeks I would take a few hours off to visit a used bookshop or go to a friend's house for dinner. I went to visit my family twice. Otherwise I just worked." - Paul Graham from http://www.paulgraham.com/start.html

Some fun quotes :)

"So, work hard, like, every waking hour. That's the thing I would say, particularly if you're starting a company. you're working 100, you'll get twice as done, as much done, in the course of the year as the other company." - Elon Musk

"I can't relate to lazy people. We don't speak the same language. I don't understand you. I don't want to understand you." - Kobe Bryant

"You should always want to out work your potential. As hard as you believe you can work, you can work harder than that." - Kobe Bryant

"We are here to put a dent in the universe." - Steve Jobs

If other people are putting in 40 hours in a week, and you're putting in 100, you will achieve in four months, what it takes them a year to achieve. That's the type of work ethic an entrepreneur needs to have, according to Elon, in this segment, called "Lesson Learned."

"There are way easier places to work, but nobody ever changed the world on 40 hours a week," Musk said, referring to the four companies -- Tesla, SpaceX, The Boring Company, and Neuralink-- where he serves as CEO.