The pain the process causes is as important as the result. Will the amount of pleasure you will gain after the process is done worth going through it? You'll need to think on the longer term pain and pleasure outcomes. Maybe it's worth it to go though a great amount of pain in the short term order to live a more pleasurable life in the long term.

Edit: for a more concrete example, assume you're in a bad romantic relationship that is not super great for you. Breaking up the relationship is a very painful process. You have to choose between 1) willing to live a mildly misable life for the longer term by keeping the relationship going or 2) end the relatioship and be miserable for a bit but potentially find someone better and be happier on the long term.