Human beings are notoriously bad predictors of the future.
We misjudge future events in general, and even if we can predict a future event with some accuracy, we misjudge what we will feel and for how long.
In that sense, the old adage is true: You are as ready, as you will ever be.
REFERENCE
Carpenter, Siri. “We Don’t Know Our Own Strength.” Monitor on Psychology, American Psychological Association, Oct. 2001, www.apa.org/monitor/oct01/strength.aspx.