The Catholic scientist who appreciates the supernatural mission of his Church will _yield to her guidance in humble confidence_, he will practise this submission to the Church by requesting permission for reading forbidden books, and by this spirit he will obtain God’s blessing on his work. In doing so he may recall to mind the edifying words of _St. Francis of Sales_, in the preface to his treatise on the errors of the Lutherans and Calvinists, where he gives the assurance of having conscientiously asked for and received permission to read their writings. “We fervently request our Catholic readers,” writes the Saint, “not to let an evil suspicion against us arise, as if we had read the forbidden books in spite of the prohibition of holy Church. We are able to assure them in all truth of having done nothing forbidden to a good Christian, and of having taken every precaution due in a matter of so vast importance, so as not to incur in any way the very just censures of the Church, nor in any manner to violate the profound reverence we owe to her.” The permission granted him, dated July 16, 1608, is still extant; likewise one asked by _St. Charles Borromeo_. The Catholic scientist also will readily ask the ecclesiastical Imprimatur for certain of his works. If a careful author before publishing a work submits the proofs to a friend of his profession, taking his comment for a guide, why should we deem it intellectual bondage if the Catholic scientist, in matters of faith and morals, submits his work to the formal approval of his Church, which to him is a higher authority than any other? and does this willingly, as in consistency with his Catholic conviction?(5) _Via stulti recta in oculis ejus, qui autem sapiens est audit consilia_, says the Wise Man. It is characteristic of the fool to be wise in his own eyes, and stubbornly to cling to his own judgment; but the prudent man seeks advice, and suffers his attention to be called to his mistakes.