Aleksandr Solzhenitsyn said this quote
“ Satiety depends not at all on how much we eat, but on how we eat. It's the same with happiness, the very same...happiness doesn't depend on how many external blessings we have snatched from life. It depends only on our attitude toward them. There's a saying about it in the Taoist ethic: 'Whoever is capable of contentment will always be satisfied. ”