out their anthropology that the human understanding can only rise to the knowledge of immaterial things by things of sense, nothing could be more useful for the philosopher than to investigate carefully the secrets of Nature, and to be conversant, long and laboriously, with the study of physical science. Indeed, they themselves prove this by their works. Thomas, and Blessed Albert the Great, and other princes of the Scholastics, did not so give themselves up to the study of philosophy, as to have little care for the knowledge of natural things. Nay, on this matter there are not a few of their words and discoveries which modern teachers approve and acknowledge to be in harmony with truth. Besides, in this very age, many distinguished teachers of physical sciences openly bear witness that there is no contradiction, truly so called, between the certain and proved conclusions of recent physics, and the philosophical principles of the Schools.
We, therefore, while We declare that everything wisely said should be received with willing and glad mind, as well as everything profitably discovered or thought out, exhort all of you, Venerable Brothers, with the greatest earnestness to restore the golden wisdom of St. Thomas, and to spread it as far as you can, for the safety and glory of the Catholic Faith, for the good of society, and for the increase of all the sciences. We say the wisdom of St. Thomas; for it is not by any means in our mind to set before this age, as a standard, those things which may have been inquired into by Scholastic Doctors with too great subtlety; or anything taught by them with too little consideration, not agreeing with the investigations of a later age; or, lastly, anything that is not probable.
Let, then, teachers carefully chosen by you do their best to instil the doctrine of Thomas Aquinas into the minds of their hearers; and let them clearly point out its solidity and excellence above all other teaching. Let this doctrine be the light of all places of learning which you may have already opened, or may hereafter open. Let it be used for the refutation of errors that are gaining ground.
