One could replace the word luck with karma if they are spiritually minded.  
 
There's plenty of scientific research on how your thoughts affect the physical world. Dr Emoto's water crystals come to mind.  
 
Whether "luck" or "karma" are real are debatable. It's interesting to note though that people who consider themselves "lucky" tend to focus on the positive things in life. Perhaps their subconscious filters out the negative? 
		
		
		
		
		
		
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