We may think there is willpower involved but more likely... change is due to want power. Wanting the new addiction more than the old one. Wanting the new me in preference to the person I am now.
Happiness is different from pleasure. Happiness has something to do with...
You do have to change things as warfare changes.
At this time when I turn 50 because so there's many of my friends and family who didn't get to see 50-years-old and so I'm celebrating for them too.