Could it be said that the great spiritual leaders are satisfied? Or are they the exception to the topic? If we allow these exceptions, by process of elimination, can we find at least one person who is satisfied?
To me, this notion of satisfaction is a primal, instinctual one. And one that we can override.
"Between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom. " - Viktor E. Frankl
I think that those who embrace this idea see life differently. At the core, there is a fundamental shift between the view of attainment to the view of service. I think that the pivotal question is: if death comes today, would you freak out or be welcoming.
The Nietzsche version of this is to think about one's life if it were to be repeated, exactly as one has lived it, a thousand times. If that idea isn't good, then what in that life would change?
I make the distinction between satisfaction as driven by the unconscious, and then by consciousness: between instincts and awareness. Satisfaction rooted in nature or one rooted in nurture.