Perhaps applicable to gambling....?

[Talesman]

"Without AMBITION one starts nothing. Without WORK one finishes nothing.
The prize will NOT be sent to you. You have to WIN it. The man who knows
HOW will always have a job. The man who also knows WHY will always be his
boss. As to METHODS there may be a million and then some, but principles
are few. The man who grasps PRINCIPLES can successfully select his own
methods. The man who tries methods, ignoring principles, is sure to have
TROUBLE."
~ Ralph Waldo Emerson

[Talesman]

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