Whether it is necessary to believe those things which can be proved by natural reason?

❌ Objection 1 : It would seem unnecessary to believe those things which can be proved by natural reason. For nothing is superfluous in God's works, much less even than in the works of nature. Now it is superfluous to employ other means, where one already suffices. Therefore it would be superfluous to receive by faith, things that can be known by natural reason.

❌ Objection 2 : Further, those things must be believed, which are the object of faith. Now science and faith are not about the same object, as stated above (Question [1], Articles [4],5). Since therefore all things that can be known by natural reason are an object of science, it seems that there is no need to believe what can be proved by natural reason.

❌ Objection 3 : Further, all things knowable scientifically [*Science is certain knowledge of a demonstrated conclusion through its demonstration] would seem to come under one head: so that if some of them are proposed to man as objects of faith, in like manner the others should also be believed. But this is not true. Therefore it is not necessary to believe those things which can be proved by natural reason.