If you choose to pursue this digression further, you can put this same idea into many other forms, without impairing or weakening its meaning: for what prevents our saying that a happy life consists in a mind which is free, upright, undaunted, and steadfast, beyond the influence of fear or desire, which thinks nothing good except honour, and nothing bad except shame, and regards everything else as a mass of mean details which can neither add anything to nor take anything away from the happiness of life, but which come and go without either increasing or diminishing the highest good? A man of these principles, whether he will or no, must be accompanied by a continual cheerfulness, a high happiness, which comes indeed from on high because he delights in what he has, and desires no greater pleasures than those which his home affords. Is he not right in allowing these to turn the scale against petty, ridiculous and shortlived movements of his wretched body? on the day on which he becomes proof against pleasure he also becomes proof against pain. See, on the other hand, how evil and guilty a slavery the man is forced to serve who is dominated in turn by pleasures and pains, those most untrustworthy and passionate of masters. We must, therefore, escape from them into freedom.