"When we assume, imply, or promise that God is supposed to bring us good luck and lots of success, we're set up for deep disappointment and spiritual cynicism," he writes. "Even worse, we risk turning the King of kings into little more than a good luck charm."
Osborne also warns that those who introduce Christ to others and testify of only the "abundant Christian life" while downplaying the "harder teachings of Jesus" set the stage for disillusionment when things go awry.
Following Christ can be tough and having faith isn't always going to fix everything.
It's another spiritual urban legend – that faith can fix anything – and one that can lead to an angry outburst or a spiritual meltdown.
As a pastor, this is one of the most common urban legends Osborne has encountered.
Many Christians believe ridding themselves of doubts and having clear positive thinking – which is how many define "faith" – will lead to their desired outcome such as physical healing. But having faith doesn't always lead to victory, at least not in the earthly sense.
While the Bible famously "tells of kingdoms won, lions muzzled, flames quenched, weaknesses turned to strength, enemies routed, [and] the dead raised," it also speaks of people of faith who were "tortured, jeered, flogged, imprisoned, stoned, sawed in two, and put to death by the sword".
They all lived by faith "yet their faith didn't fix anything", Osborne points out.
What faith does promise, however, is forgiveness and the gift of eternal life.
"Faith is ... not an impenetrable shield that protects us from life's hardships and trials. It's not a magic potion that removes every mess," Osborne writes in his book. "It's designed to guide us on a path called righteousness."
Faith, Osborne says, is trusting enough to obey.
Other eight spiritual urban legends he lists are: forgiving means forgetting, a godly home guarantees godly kids, God has a blueprint for my life, Christians shouldn't judge, everything happens for a reason, let your conscience be your guide, a valley means a wrong turn, and dead people go to a better place.
The common thread through all of them, Osborne said, is the "disillusionment that comes when we bank of promises that God actually never made".
They're "partial truths that we shouldn’t be building the whole house on," said Osborne, who has been teaching a four-week series on urban legends – which include more than ten – over the past few summers.
While Christians are not likely to buy into all of them, most may have one or two that they fall victim to, the North Coast pastor believes.
"Sometimes we treat the Bible as if it's a series of sound bites and little sayings that we can put on t-shirts, coffee cups and posters," Osborne pointed out. "But it's a big book.
"We need to look at what the Bible says about any subject in all of its passages. And when we do that we'll avoid these urban legends."
