Elon Musk explains why many people are afraid to take risks and achieve greatness

It’s the most rational reason imaginable–but it can lead to a boring, ordinary life.

The most powerful threat to greatness isn’t evil. It’s mediocrity.

Of all the colorful ways to articulate that truth, one of the best is what Elon Musk told Chris Anderson of Wired magazine, back in 2012.

They were talking about Musk’s space exploration company, SpaceX, which grew out of Musk’s “crazy idea to spur the national will” to travel to Mars–by first sending a private rocket to the red planet.

He tried to slash the cost of his quixotic dream by buying Cold War Russian missiles to turn into interplanetary rockets. While negotiating that deal, he realized that it wasn’t lack of “national will” that held the U.S. back from exploring space.

Instead, it was a lack of affordable technology–and the high cost, he told Anderson, was the result of some “pretty silly things” in the aerospace industry, like using legacy rocket technology from the 1960s.

That’s the quote that I liked so much, especially those last six words: a “bias against risk,” because everyone is “trying to optimize their ass-covering.”

It’s funny–but also poignant. And, of course, it applies to a lot more than space exploration.

It applies to the vast majority of successful companies that get stuck producing legacy products–because they can’t risk that innovation might upset their own profit models.

It applies to the service providers that make a mockery of the word “service” (say, for example, big airlines and utility companies)–because cost-cutting with crappy service maximizes shareholder value.

It applies also to temptations in our personal lives, and in the lives of those around us.

Think of the colleagues you know who hold onto uninspiring jobs for fear of going after the careers or entrepreneurial dreams they really want.

Or think of the friend you might have (I think most of us do), who stays in a lousy relationship because he or she is more afraid of being alone than of living with less than they deserve.

We’re all a little bit afraid of risk. Yet, each day represents a new chance and a new beginning. At the start of the year, that sense is especially acute.

And sometimes we need a little inspiration to take the leap.

Whatever is the thing you’re afraid of trying–a new business, a new adventure, a new relationship–maybe now is the time to give it a try.

Cast aside your risk aversion. Be uncomfortable for a while as you try something new. Accept the chance that you’ll fail.

Don’t optimize your ass-covering. Instead, optimize your opportunities. And find your own mission to Mars.