For the last several years I have coached a 5th-6th grade boys basketball team in our neighborhood. Today was the last day of the season and we did not win the championship. We had talent and size (important in basketball), but one thing was missing that is a key for success.
The boys were always on each other for simple mistakes. Always trying to do things on their own. Always seeing the faults of others and never taking responsibility for their own mistakes. Not all of them were like this, but most of them.
Basketball is just a game, but life requires teamwork as well.
Marriages are in trouble when a spouse sees every little mistake in their spouse. A business won't last if each employee tries to accomplish everything by themself. A church will be in trouble if it's people are always pointing out each others faults and too prideful to face up to their own failures.
How do you see teamwork as important?