We can define prosperity in one short phrase: gaining any possible perfection that man has capacity and competence for achieving it, and in other words, correct utilization of different material and spiritual powers being available for man.
But since to the same extent that perfection and utilization are clear in view of general sense, they are ambiguous and complicated in view of partial concepts, most often people have mistaken the path of prosperity so that for example, one egoist rich man, who has exchanged the heartsease and relief of his spirit and body with accumulation of a massive wealth, may consider himself prosperous, while his capricious child, after death of father, deems scattering of this wealth for satisfaction of his lusts as prosperity, and in the meantime both of them are wrong.
Anyway, herein we shall recognize man's real perfection and correct way of utilizing these material and spiritual favors, although this recognition may need a great deal of study and inconvenience.