Misc: who wrote the neverending story?

Questions

"Life is like riding a ---------. You don't fall off unless you plan to stop pedaling."- Claude Pepper?

"The less things ----------, the more they remain the same."- Sicilian proverb?

"Life is what happens while you are busy ---------------."- John Lennon?

"If you have never been --------- by your child, you have never been a parent."- Bette Davis (1908 - 1989)?

"Life would be infinitely happier if we could only be born at the age of ----------- and gradually approach eighteen."- Mark Twain (1835 - 1910)?