What makes a 70% moment into a 100% moment is not 30% of something, but 30% of nothing.
Happiness comes from being content with the 70%; the other 30% is having peace of mind to enjoy the 70%.
(Image source: Puuung http://www.grafolio.com/puuung1/works.grfl)
(inspired from 1cm art by Eun Joo Kim)