Basketball is a sport of momentum. This momentum can carry a coach, it can carry a player, it can carry a team, or it can even carry the whole league. This momentum can last a few seconds, a few minutes, a few quarters, a few games, or even a few seasons. But the problem with basketball momentum is its transient nature.
Momentum is a wave of power, a flow of force, and a state of superiority that can make champions. But it doesn't last forever, it can disappear, it can also come back. Some argue that Jordan never lost his momentum - but that is far from the truth - even Jordan couldn't create momentum with the Washington Wizards.
The lesson of momentum in basketball is a common one - cherish the momentum, make the best of momentum, and never assume that it will last forever.