If a man knows not to which port he sails, no wind is favorable.
Luck is what happens when preparation meets opportunity.
This line is widely circulated under this name. It may be a paraphrase, a later coinage, or a doubtful ascription. It stays because the collection used it; treat the byline as traditional, not proven.
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Luck is what happens when preparation meets opportunity.
Seneca
The Commonplace