Why did the spanish ruled the Philipines

Spain had three objectives in its policy toward the Philippines, its only colony in Asia: to acquire a share in the spice trade, to develop contacts with China and Japan in order to further Christian missionary efforts there, and to convert the Filipinos to Christianity. Only the third objective was eventually realized, and this not completely because of the active resistance of both the Muslims in the south and the Igorot, the upland tribal peoples in the north. Philip II explicitly ordered that pacification of the Philippines be bloodless, to avoid a repetition of Spain's sanguinary conquests in the Americas. Occupation of the islands was accomplished with relatively little bloodshed, partly because most of the population (except the Muslims) offered little armed resistance initially.