Is spilling salt considered good luck?
Just the opposite. The origins of the spilling salt superstitions may lie in the fact that spilling salt was considered bad form long before it was considered bad luck. In ancient times salt was an expensive commodity, and one that had many useful purposes. Wasting salt, therefore, was frowned upon, and so some suggest that the admonition of spilling salt being “bad luck” came about as a way to stop the careless from wasting a precious spice. But what of throwing the salt over the shoulder- and why the left shoulder so specifically? In some Christian beliefs the Devil hangs about over the left (also known as the Sinister) side of the body, looking for an opportunity to invade. Spilling salt, seen as an invitation for the Devil to do his handy work, needs to be accounted for- tossing said salt over the left shoulder puts it square in the devil’s face, just as he is on the attack. There is another Christian origin that some ascribe to the superstition that spilling salt is bad luck. Like
