Luck !

The definition of luck (or chance) varies by the philosophical, religious, mystical, or emotional context of the one interpreting it. Luck is "a purposeless, unpredictable and uncontrollable force that shapes events favourably or unfavourably for an individual, group or cause".

When thought of as a factor beyond one's control, without regard to one's will, intention, or desired result, there are at least two senses that people usually mean when they use the term, the prescriptive sense and thedescriptive sense. In the prescriptive sense, luck is a supernatural and deterministicconcept that there are forces (e.g. gods or spirits) that prescribe that certain events occur very much the way laws of physics will prescribe that certain events occur. It is the prescriptive sense that people mean when they say they "do not believe in luck". In the descriptive sense, people speak of luck after events that they find to be fortunate or unfortunate, and maybe improbable.

Therefore, cultural views of luck vary from perceiving luck as a matter of random chanceto attributing to such explanations of faith orsuperstition. 

Lucky symbols are popular worldwide and take many forms.