So there is an important Jewish (and non-Jewish) concept of the evil eye (in hebrew, it's called an "Ayin Hara").
This is the idea that people who are jealous of you or simply don't like you, can wish bad (or evil to befall) on you.
And the more people or the more merits these people have in life that cast this evil wish (in mystical terms, some may call it a spell), perhaps the stronger the potency of it on you.
Superstition or real? This is a matter of what you believe in and maybe experiences you've had in life have taught you to beware of when others don't wish you well.
This is why many righteous people try to avoid the limelight--they don't want others to focus on them and harbor bad feelings toward them.
Better in a sense to remain more private and discrete than suffer the evil eye of others.
If we understand that there are not only physical powers in the universe, but also spiritual and metaphysical ones, then we may choose to protect ourselves by shielding ourselves from the public eyes of jealousy and hate.
Others may choose to do extra charity, prayer, and good deeds in an effort to protect themselves from competitors and antagonists in life.
It's funny, but when my wife sees someone she perceives giving another the evil eye, she calls it, "The stink eye!"
And truly, it does stink that people can be so mean and hateful to others, but unfortunately, not everyone in life is nice and good.
It takes all types, and that is why it's critical to avoid those evil glances, feelings, and thoughts of others.
Hurt can take many forms--words and deeds are the two that we recognize most often.
However, we shouldn't discount the harm that thoughts and feelings can cause as well.
The mind and spirit of humans can reach out and up to the Heavens, and so we must live our lives good to G-d as well to people, and Bli Ayin Hara (without the evil eye) for blessings and not for curses.
(Source Photo: Andy Blumenthal)