There is winning and there is misery.
Meaning of the quote
The quote means that in life, there are two main outcomes: success and failure. When you work hard and achieve your goals, that is winning. But when things don't go your way, that can lead to unhappiness or misery. The coach is saying that these two experiences - winning and misery - are both a part of life. You have to be prepared to handle both.

About Bill Parcells
Bill Parcells was a legendary NFL coach who led the New York Giants, New England Patriots, New York Jets, and Dallas Cowboys to the playoffs. He won two Super Bowl titles with the Giants and is the only coach to take four different franchises to the playoffs and three to a conference championship game.
More quotes from Bill Parcells
You are what you are.
American football coach (born 1941)
There is winning and there is misery.
American football coach (born 1941)
When you don’t know that you don’t know, it’s a lot different than when you do know that you don’t know.
American football coach (born 1941)
My entire life has been spent thinking about this game. That’s pretty narrow… I don’t view myself as a person who’s well-versed in very many subjects. I’m not proud of that.
American football coach (born 1941)
No matter how much you’ve won, no matter how many games, no matter how many championships, no matter how many Super Bowls, you’re not winning now, so you stink.
American football coach (born 1941)
I like linebackers. I collect ’em. You can’t have too many good ones.
American football coach (born 1941)
Something goes wrong, I yell at them -“Fix it”- whether it’s their fault or not. You can only really yell at the players you trust.
American football coach (born 1941)
Success is never final, but failure can be.
American football coach (born 1941)
Don’t worry about it. It’s just a bunch of guys with an odd-shaped ball.
American football coach (born 1941)