Thoughts, action or feelings..?

To what ‘will power’ is actually applicable to?
Is it actions, or are they pre action thoughts?  Well there is a third factor too where applying ‘will power’ would be more fruitful and light on taking decisions regarding what thought to allow and what actions to take, its the feelings.  As how you feel is more important than what you do, applying ‘will power’ to thoughts and consciously choosing the ‘feelings’ or ’emotions’ you want to have will make your ‘decision of what action too take’ much more simple and straight as then the ‘action’ won’t be decided based on its ‘upcoming’ result which not known and affected by certain outside factors too but it would be decided based on intention to continue to have those ‘feelings’ you currently have in your body.