Common courtesy calls for a handshake between winner and loser after a contest. It's a simple gesture that holds a lot of meaning. It is an exercise in diffusing any lingering animosity. It makes it possible for both parties to move on with dignity.

To refuse to acknowledge the accomplishment of the winner is to give birth to a grudge. And nothing good, for either side, ever comes out of a lingering grudge.

But the moment of concession is also a chance at redemption for the loser. It allows them to be a role model of humility and grace. It proves them nobler than their loss might suggest. Conceding is actually a power move demonstrating that you are not defined by losing. You are bigger than that.

"A tree is best measured when it is down, and so it is with people," wrote the poet and author Carl Sandburg, who won a Pulitzer Prize for an autobiography of Abraham Lincoln, a man who had his share of wins born out of deep losses.

To lose an election -- a very public defeat that can be personally devastating -- raises the stakes enormously. The act of concession there is both necessary for a peaceful transition of power and an opportunity for the loser to show everyone that he or she is sagacious enough to put the greater good above all else.

One of the best concession speeches ever given, presidential or otherwise, was delivered in 1952 by Adlai Stevenson. "That which unites us as American citizens is far greater than that which divides us as political parties," he said. "I urge you all to give to General Eisenhower the support he will need to carry out the great tasks that lie before him. I pledge him mine." The New Yorker's political commentator Hendrik Hertzberg called Stevenson "the most beautiful loser."

By contrast, Hope Solo, the goalkeeper for the US women's national soccer team, called her triumphant opponents "cowards" after her team lost to Sweden at the Olympic quarterfinal game in Rio this summer. The rebuke to her unsportsmanlike behavior went beyond the ire of fans; the US Soccer Federation suspended her for six months and terminated her contract with the team. For failing to transcend her loss, she doubled it.

Anyone who plays chess, or nearly any game of strategy, knows that the more you play, the more you learn how to win. And if you play someone who is better than you (and therefore find yourself mostly losing), you will learn a lot more about winning. Every defeat brings you one step closer to success.

Thinking about loss that way -- as chess pieces on the board -- is a helpful metaphor for making losing less personal, too. Losing some contest doesn't make you a loser. You are still you, not whatever challenge was lost.

You don't need to go far back for political examples to illustrate this point. Hillary Clinton faced stinging defeats in the 2008 presidential race and in her failed efforts to pass national health care legislation in the mid-1990s. Part of her narrative today is that losing on health care only focused her resolve to increase access to children, which she accomplished for 8 million of them with the Children's Health Insurance Program in 1997. And clearly, her 2016 campaign strategy and ground game were greatly informed by lessons learned from her defeat eight years ago.

The sooner you can dust yourself off and figure out why you lost, the sooner you'll be able to refocus on what matters and -- now more experienced -- win. In a Buddhist context, we will continue to be reincarnated until we can break the cycle of unknowing; each of our lives holding the keys to one door closer to enlightenment or another farther away.

The idea that losing is a necessary part of winning begins to blur the lines of what is a loss and what is a win. A victory can have unforeseen consequences that feel more like a loss over time (which is why people say "be careful what you wish for"). And, conversely, the loser now will be later to win, as Bob Dylan put it.

There are countless examples of this phenomenon. Many lottery winners face personal difficulties they attribute to their windfall. Individuals with devastating mental and physical challenges often describe how overcoming them made them stronger for it. And maybe that awful breakup made it possible to find true love.

This yin-and-yang way of seeing the world, in which good and bad are so entwined that they are contained in one another, is beautifully illustrated in an ancient Taoist story about a farmer whose horse runs away. The lost horse, which seems like setback, causes something that seems like an advantage, which then causes something that seems bad and so on.

The point is that we should really question the reality of a win or loss, knowing that time and circumstance have a way of making them become the opposite.

Losing can also be the catalyst of a new beginning. The higher the stakes of the loss, the greater opening it creates for a restart, a reinvention, a fresh beginning in another direction. Examples of coming back strong after reaching a breaking point or one of life's curveballs, to mix my sports metaphors, are so numerous that CNN Health has a series devoted to them, called Turning Points.

The phoenix is the mascot of winning losers everywhere. Take a moment to pause in the ashes of a loss to contemplate what new, amazing life can grow out it. That's a powerful consolation prize.

Jimmy Carter is beloved the world over despite a presidency that experts and conventional wisdom deemed a failure. His legacy is solidified by a post-presidential life of great deeds including international diplomacy, building homes for the homeless and nearly eradicating deadly diseases. Losing re-election in 1980 brought about a 36-year winning streak.

Finally, there are some virtues that grow more easily out of the compost of losing. Humility is an obvious one. Empathy is another, as loss creates bonds with, and therefore is useful to, others facing a similar loss. And when you expand your perspective and understanding around loss, you become wiser, another virtue to have in your resiliency tool kit.

Then there is grit. For even if there are no clear lessons learned from a loss or no upsides that later emerge, at the very least, you can learn how to deal with it more effectively. Because eventually, another loss will come, and you want to be ready.

The development of such fortitude is encapsulated by my favorite line in one of my favorite novels, John Steinbeck's "The Grapes of Wrath." The story chronicles the western migration of many farmers during the Great Depression, a period of profound losing for many Americans.

One of the setbacks for the main characters, the Joad family, is when their car breaks down, again. They don't have the means to fix it, and a pall is cast over the group until the grandmother snaps them out of it. "This here bearing went out. We didn' know it was goin', so we didn' worry none. Now she's out an' we'll fix her. An' by Christ that goes for the rest of it."

The thicker your skin, the more perspective you have, the more you improve yourself -- and the more you'll be winning as you wrestle, as always, with losing.