I look at it from the long-term, consistency viewpoint. There is good luck and bad luck in just about all of life's ventures. Stuff happens for whatever reason, nobody can predict. Put the effort into any endeavor and over the long haul you will become a consistent winner. Those who really do well in the stock market, for example, put in the time and effort to learn the market, invest in a timely manner when a choice seems to be correct and then grow your portfolio with a long-term determination. Same with hunting and fishing, the more you know about your game, over the long haul, you will be a CONSISTENT WINNER and not just a lucky SOB.