There is no shop after this village/

Opportunity never patronizes an unprepared mind

The weak wait for opportunities, and the strong create them.

Madame Curie

Opportunity favors those who are prepared.

There are many encounters in the world, depending on whether you understand or not.

Opportunities tend to favor those who are prepared.

Opportunity knocks only once.

Don't wait for the boy's head to turn white and empty.

Specific application, there will be no progress. If you have a good idea, but don't contribute it, life will not improve. -william james's famous saying about "being ready to win everything"

Carnegie: People who don't prepare for tomorrow will never have a future.