Dear Gloria,
It seems to me that a word is missing in the sentence: The energy that resisting and resenting what life hands you could spend more productively.
Why not be satisfied? Why not be satisfied rather than dissatisfied? Consider that your satisfaction or dissatisfaction level is like a flag that you hang out in front of your house. This flag indicates how you feel about your life. The energy that resisting and resenting what life hands you could spend more productively. Even when you don’t outwardly complain, when you feel that life must treat you differently, you are setting up a pattern of discouragement. Wouldn’t it be better to set up a pattern of encouragement?
I take it that you mean to say: .... who whistled while they worked.
You can be like the seven dwarfs in Snow White who whistled why they worked.
Love,
Luus