By John Blake, CNN

(CNN) – NFL legend Mike Ditka was giving a news conference one day after being fired as the coach of the Chicago Bears when he decided to quote the Bible.

“Scripture tells you that all things shall pass,” a choked-up Ditka said after leading his team to only five wins during the previous season.  “This, too, shall pass.”

Ditka fumbled his biblical citation, though. The phrase “This, too, shall pass” doesn’t appear in the Bible. Ditka was quoting a phantom scripture that sounds like it belongs in the Bible, but look closer and it’s not there.

Ditka’s biblical blunder is as common as preachers delivering long-winded public prayers. The Bible may be the most revered book in America, but it’s also one of the most misquoted. Politicians, motivational speakers, coaches - all types of people  - quote passages that actually have no place in the Bible, religious scholars say.

These phantom passages include:

“God helps those who help themselves.”

“Spare the rod, spoil the child.”

And there is this often-cited paraphrase: Satan tempted Eve to eat the forbidden apple in the Garden of Eden.

None of those passages appear in the Bible, and one is actually anti-biblical, scholars say.

But people rarely challenge them because biblical ignorance is so pervasive that it even reaches groups of people who should know better, says Steve Bouma-Prediger, a religion professor at Hope College in Holland, Michigan.

“In my college religion classes, I sometimes quote 2 Hesitations 4:3 (‘There are no internal combustion engines in heaven’),” Bouma-Prediger says. “I wait to see if anyone realizes that there is no such book in the Bible and therefore no such verse.

“Only a few catch on.”

Few catch on because they don’t want to - people prefer knowing biblical passages that reinforce their pre-existing beliefs, a Bible professor says.

“Most people who profess a deep love of the Bible have never actually read the book,” says Rabbi Rami Shapiro, who once had to persuade a student in his Bible class at Middle Tennessee State University that the saying “this dog won’t hunt” doesn’t appear in the Book of Proverbs.

“They have memorized parts of texts that they can string together to prove the biblical basis for whatever it is they believe in,” he says, “but they ignore the vast majority of the text."

Phantom biblical passages work in mysterious ways

Ignorance isn’t the only cause for phantom Bible verses. Confusion is another.

Some of the most popular faux verses are pithy paraphrases of biblical concepts or bits of folk wisdom.

Consider these two:

“God works in mysterious ways.”

“Cleanliness is next to Godliness.”

Both sound as