Well I think any author or musician is anxious to have legitimate sales of their products, partly so they're rewarded for their success, partly so they can go on and do new things.
According to materialistic science, any memory requires a material substrate, such as the neuronal network in the brain or the DNA molecules of the genes.
All happiness depends on courage and work. I have had many periods of wretchedness, but with energy and above all with illusions, I pulled through them all.