Probability is expectation founded upon partial knowledge. A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave nether room nor demand for a theory of probabilities.
If I had my way, if I was lucky enough, if I could be on the brink my entire life - that great sense of expectation and excitement without the disappointment - that would be the perfect state.
The interval between a cold expectation and a warm desire may be filled by expectations of varying degrees of warmth or by desires of varying degrees of coldness.