If you want to confirm your purpose, the appearance of a sudden opportunity is a great test.  If your purpose is all about adventure then a “drop everything” decision for a new adventure is an easy decision.  However, if your purpose involves systematic steps and planning, then “drop everything” will trip your decision-making circuit breakers.  What would you say “yes” to without hesitation (do not confuse fear and purpose)- why not give it a try?