But, then, there is, nowadays, so much sound knowledge to be gained, not to speak of so many books and papers of mere pastime and amusement, that it may well be asked by a young man who is to be a minister whether he is indeed called to be like that great student who took all knowledge for his province.  Yes, indeed, he is.  For, if the minister and interpreter of nature is to lay all possible knowledge under contribution, what must not the minister of Jesus Christ and the interpreter of Scripture and providence and experience and the human heart be able to make the sanctified use of?  Yes, all kinds and all degrees of knowledge, to be called knowledge, belong by right and obligation to his office who is the minister and interpreter of Him Who made all things, Who is the Heir of all things, and by Whom all things consist.  At the same time, since the human mind has its limits, and since human life has its limits, a minister of all men must make up his mind to limit himself to the best knowledge; the knowledge, that is, that chiefly concerns him,—­the knowledge of God so far as God has made Himself known, and the knowledge of Christ.  He must be a student of his Bible night and day and all his days.  If he has not the strength of understanding and memory to read his Bible easily in the original Hebrew and Greek, let him all the more make up for that by reading it the oftener and the deeper in English.  Let him not only read his Bible deeply for his sermons and prayers, lectures and addresses, let him do that all day every day of the week, and then read it all night, and every night of the week, for his own soul.  Let every minister know his Bible down to the bottom, and with his Bible his own heart.  He who so knows his Bible and with it his own heart has almost books enough.  All else is but ostentatious apparatus.  When a minister has neither understanding nor memory wherewith to feed his flock, let him look deep enough into his Bible and into his own heart, and then begin out of them to write and speak.  And, then, for the outside knowledge of the passing day he will read the newspapers, and though he gives up all the morning to the newspapers, and returns to them again in the evening, his conscience will not upbraid him if he reads as Jonathan Edwards read the newsletters of his day,—­to see how the kingdom of heaven is prospering in the earth, and to pray for its prosperity.  And, then, by that time, and when he has got that length, all other kinds of knowledge will have fallen into its own place, and will have taken its own proper proportion of his time and his thought.  He was a man of a great understanding and a great memory and great industry who said that he had taken all knowledge for his province.  But he was a far wiser man who said that knowledge is not our proper happiness.  Our province, he went on to say, is virtue and religion, life and manners:  the science of improving the temper and making the heart better.  This is the field assigned us to cultivate:  how much it has lain neglected is indeed astonishing.