Carlsbad2 - couldn’t agree with you more, especially your opening sentence. 
You can tell who is successful in their life and who isn’t. Here are some quotes that I feel successful people resemble;

Success often requires sacrifice and discomfort; an idea we can't commit to without some level of obsession. 

Obsession Is the #1 Habit of Highly Successful People

Obsession has been defined as “the domination of one's thoughts or feelings by a persistent idea, image, or desire.”

“The people who succeed are irrationally passionate about something”

“Obsession isn’t comfortable”