Here's what some other people say about knowing when to quit:
"Winners quit all the time. They just quit the right stuff at the right time."
"The Dip: A Little Book That Teaches You When to Quit (and When to Stick)" by Seth Godin.
"Sometimes 'quitters' are actually just choosers. Choosing a new goal or activity that better suits your changing realities is an extremely smart way to quit."
Victoria Wynn, author and life coach
To figure out if it's time to quit something, "take five minutes at the end of the week and reflect on what you have achieved versus what you had to give up to achieve it. … There are always going to be sacrifices, but they should never outweigh the benefits."
Kosio Angelov, founder of High Performance Lifestyle.
"There is a difference between quitting and giving up. Giving up may be more closely associated with waning willpower or commitment. It is more about the person than the situation. Quitting, on the other hand, is more value-neutral. It is a thoughtful choice that considers how we got where we are and what we sacrifice to stay here. It is balanced and measured."
The Journal of Healthcare Contracting