Bill Gates has rightly chosen philanthropic work as his mission ln life. Although, he had been the richest person in the world, the greatnesss does not come with earning money and holding, but by giving. The monetary wealth makes you unworthy of realizing life's poetntial fully if your money is not used in charity, for a good cause.
A few years ago, Bill Gates had said "Life Is unfair; get used to it." Money spent by Gates on charity won't buy reall happiness for others, but it would do good to his own personality. As per Indian traditions, all money spent on 'daan' purifies our mind and brings us nearer to God. May this chairity work help Bill Gates in finding the real meaning and purpose of his existence.