All superstitions exist at least in part to satisfy the emotional need — Superstition

"“Superstition” is simply a derogative term for a belief about the supernatural that you don’t share. Why should it be socially acceptable to make fun of psychics and not priests? What’s the difference between crossing yourself or hanging a mezuzah outside your door and avoiding black cats? Believing that you’ve been abducted by aliens or that Elvis is alive is, on its face, no sillier than believing that Christ rose from the dead or that God parted the Red Sea so that Moses and his followers might traverse it. People who believe that God heeds their prayers have probably waived the right to mock people who talk to trees and guardian angels or claim to channel the spirits of Native Americans."

"The three great things that govern mankind are reason, passion, and superstition. The first governs a few, the two last share the bulk of mankind, and possess them in their turns; but superstition most powerfully and produces the greatest mischief."

"One of the largest promises of science is, that the sum of human happiness will be increased, ignorance destroyed, and, with ignorance, prejudice and superstition, and that great truth taught to all, that this world and all it contains were meant for our use and service; and that where nature by her own laws has defined the limits of original unfitness, science may by extract so modify those limits as to render wholesome that which by natural wildness was hurtful, and nutritious that which by natural poverty was unnourishing. We do not yet know half that chemistry may do by way of increasing our food."

"The general root of superstition: namely, that men observe when things hit, and not when they miss; and commit to memory the one, and forget and pass over the other."

"It is science alone that can solve the problems of hunger and poverty, of insanitation and illiteracy, of superstition and deadening custom and tradition, of vast resources running to waste, of a rich country inhabited by starving people... Who indeed could afford to ignore science today? At every turn we have to seek its aid... the future belongs to science and those who make friends with science."

"Dish yer rabbit footll gin you good luck. De man wat tote it mighty apfer ter come out right en up wen deys any racket gwine on in de neighborhoods, let er be whar she will en wen she may; mo espeshually ef de man wat got it know zactly wat he got ter do."