That the foreknowledge of these can be attained has already been demonstrated; and it remains to speak of the utility of the attainment. First, however, let it be said in what respect and with what view it is proposed to draw advantage from this science; if it be considered in its tendency to promote the good of the mind, no object more advantageous can surely be wanting to induce the world to rejoice and delight in it, since it offers an acquaintance with things divine and human: if it be considered in respect to the benefits it is capable of conferring on the body, its utility in this view also, will be found on comparison to excel that of all other arts conducive to the comforts of life, for it is of more general application and service than all the others together. And, although it may be objected to the art of prescience, that it does not co-operate towards the acquirement of riches or glory, let it also be remembered that the same objection attaches to every other art and science; since there is not one which can of itself produce either riches or glory, not yet is there one which is on that plea deemed useless: it seems, therefore, that the science of prognostication, with its high qualifications and its aptitude to the most important objects, does not, in any greater degree, deserve to be condemned. In general, however, the persons who attack and reprobate it as being useless, do not pay due regard to the manner in which it becomes necessary; but deny its utility on the specious argument that it is superfluous and puerile to attempt to foreknow things which must inevitably come to pass: thus considering it in a mode at once abstracted, unlearned, and unfair. For, in the first place, this fact ought to be kept in view, that events which necessarily and fully happen, whether exciting fear or creating joy, if arriving unforeseen, will either overwhelm the mind with terror or destroy its composure by sudden delight; if, however, such events should have been foreknown, the mind will have been previously prepared for their reception, and will preserve an equable calmness, by having been accustomed to contemplate the approaching event as though it were present, so that, on its actual arrival, it will be sustained with tranquillity and constancy.