What is happiness? If we mean by it a state of fulfillment, when everything is going our way, in terms of results as well as efforts (which requires a providential combination of pluck and luck), then it cannot simply be willed; it is partly, if not largely, a gift of fate.
Having said this, even this sort of happiness is a product of positive thinking and positive action, with good fortune lending a helping hand. In short, it is a product of will in relatively favorable circumstances. But isn't it peculiar to imply that happiness can be of one sort or another? Are there not simply happiness and unhappiness? I think not. The sort of happiness that the sage talks about is compatible with misfortune. It is preeminently a doing from within