Thus considered, the various goods of the temporal order do, or at least may, under certain conditions, co-operate unto man's salvation, and then they belong to the supernatural order. As such, the efficacy of prayer in their regard must be judged according to the principles applying to the latter. 3. _All those things which any one can obtain himself without extraordinary effort, are not comprised within the scope of prayer._ This restriction results from the very nature of prayer. Obviously, prayer is not the only means by which man can obtain those things which, on the one hand, he momentarily does not possess, and which, on the other hand, are necessary or advantageous for his supernatural life. As a rule, man can, by labor and application, procure his sustenance. Persons unable to work can have recourse to the charity of their fellow-men, and will, as a rule, find the necessary assistance. In regard to salvation, it must first be ascertained whether in many or at least in some cases, the faithful co-operation with the graces which God gives to all men is not sufficient. Considered from this view, we may, and even must, in a certain sense say: When there is question of attaining specified goods and specified graces, prayer is often not the primary, but only the secondary and subordinate means. From this premise follows that God in His wise providence does not have regard for our prayer when we easily can help ourselves, either by our own exertion and industry, or by the faithful cooperation with graces already received, or by the reception of the holy sacraments. This self-evident idea is expressed in Holy Scripture as follows, "Because of the cold the sluggard would not plow; he shall beg therefore in the summer, and it shall not be given him" (_Prov._ xx. 4). For this reason formal miracles are, as a rule, not to be expected from the efficacy of prayer. God ordained the world and its course in such a manner, that mankind in general and each individual in particular can be provided, without the intervention of a miracle, with all things necessary for their temporal and eternal welfare. Theologians, therefore, teach that to ask God for a miracle, generally, is the same as to tempt Him. This rule, however, admits of exceptions. And if we may, in exceptional cases, ask for miracles, we may, logically, expect them; for miracles in general are not excluded from the plan of divine Providence. They are rather an essential part of the existing order of God's government of the world. At most we may say: As miracles of their nature belong among the extraordinary manifestations of Providence, they are not obtained by the prayer of each and every one, but only in exceptional cases.