He asserted, on all occasions, the divine authority and sacred efficacy of the holy scriptures; and maintained that they alone taught the way of salvation, and that they only could give peace of mind. The excellency of the Christian religion was the frequent subject of his conversation. A strict obedience to the doctrine, and a diligent imitation of the example of our blessed saviour, he often declared to be the foundation of true tranquillity. He recommended to his friends a careful observation of the precept of Moses, concerning the love of God and man. He worshipped God as he is in himself, without attempting to inquire into his nature. He desired only to think of God, what God knows of himself. There he stopped, lest, by indulging his own ideas, he should form a deity from his own imagination, and sin by falling down before him. To the will of God he paid an absolute submission, without endeavouring to discover the reason of his determinations; and this he accounted the first and most inviolable duty of a Christian. When he heard of a criminal condemned to die, he used to think: Who can tell whether this man is not better than I? or, if I am better, it is not to be ascribed to myself, but to the goodness of God. Such were the sentiments of Boerhaave, whose words we have added in the note [39]. So far was this man from being made impious by philosophy, or vain by knowledge, or by virtue, that he ascribed all his abilities to the bounty, and all his goodness to the grace of God. May his example extend its influence to his admirers and followers! May those who study his writings imitate his life! and those who endeavour after his knowledge, aspire likewise to his piety! He married, September 17, 1710, Mary Drolenveaux, the only daughter of a burgomaster of Leyden, by whom he had Joanna Maria, who survived her father, and three other children, who died in their infancy. The works of this great writer are so generally known, and so highly esteemed, that, though it may not be improper to enumerate them in the order of time, in which they were published, it is wholly unnecessary to give any other account of them. He published, in 1707, Institutiones medicae; to which he added, in 1708, Aphorismi de cognoscendis et curandis morbis. 1710, Index stirpium in horto academico. 1719, De materia medica, et remediorum formulis liber; and, in 1727, a second edition. 1720, Alter index stirpium, &c. adorned with plates, and containing twice the number of plants as the former. 1722, Epistola ad cl. Ruischium, qua sententiam Malpighianam de glandulis defendit. 1724, Atrocis nee prius descripti morbi historia illustrissimi baronis Wassenariae. 1725, Opera anatomica et chirurgica Andreae Vesalii; with the life of Vesalius. 1728, Altera atrocis rarissimique morbi marchionis de Sancto Albano historia. Auctores de lue Aphrodisiaca, cum tractatu praefixo. 1731, Aretaei Cappadocis nova editio. 1732, Elementa Chemiae.