Curses and Boons
When a person gets cursed and is aware of it, that person will tend to have thoughts about being cursed - even as they’re trying to not think about it, they are thinking it, and thereby having faith in it, and giving it power over themselves. The curse thus follows the person around and may have an effect pertinent to the terms of the curse (ie a curse of bad luck). The opposite is also true: being aware of being given a boon gives a boon power to help the person. To this extent a curse or boon that the recipient is unaware of is far less effective, since they don’t hold any faith in it; but the person sending the curse or boon is aware of it, and their faith in it alone may have an effect on the recipient.