Consider a rigged die with the probabilities for hitting any one of each of the six numbers skewed in some way. You won't be able to tell that it is the case until you roll it many times.

Consider an entrepreneur. She has the ability to build a great product. Given one day at it success may not be evident, but after months, or years of persistence, she'd (eventually) achieve the result her potential affords her.

There is nothing wrong with your examples, but it's a more narrow example.