For the Stoics, then, our judgments about the world are all that we can control, but also all that we need to control in order to be happy; tranquility results from replacing our irrational judgments with rational ones

And here lies the essential between Stoicism and the modern-day 'cult of optimism.' For the Stoics, the ideal state of mind was tranquility, not the excitable cheer that positive thinkers usually seem to mean when they use the word, 'happiness.' And tranquility was to be achieved not by strenuously chasing after enjoyable experiences, but by cultivating a kind of calm indifference towards one's circumstances.

And here lies the essential difference between Stoicism and the modern-day 'cult of optimism.' For the Stoics, the ideal state of mind was tranquility, not the excitable cheer that positive thinkers usually seem to mean when they use the word, 'happiness.' And tranquility was to be achieved not by strenuously chasing after enjoyable experiences, but by cultivating a kind of calm indifference towards one's circumstances.

But sometimes you simply can't make yourself feel like acting. And in those situations, motivational advice risks making things worse, by surreptitiously strengthening your belief that you need to feel motivated before you act. By encouraging an attachment to a particular emotional state, it actually inserts an additional hurdle between you and your goal. The subtext is that if you can't make yourself feel excited and pleased about getting down to work, then you can't get down to work.