Warren Buffett’s quote

"You ought to have a good time all time as you go along. If you say ‘I’m taking this job – I do not really like this job but in 3 years, it will lead to this’, forget it. Find one you like right now."
– Warren Buffett

I really wonder whether he said this before or after he made it big. Because it sure make hell lotsa difference if i am going to implement this philosophy in my life.