punishments and rewards, and taught nothing as to the immortality of the soul. But he discovered that the Bible itself observes silence about a purely spiritual future life, and does not bring within the circle of religion the idea of a soul separated from the body. In short, his investigations led him away not only from Catholicism and Rabbinical Judaism, but from the Bible itself. It is not known how it was circulated that the excommunicated Da Costa intended to give public offense, but he was anticipated. Samuel da Silva, a Jewish physician, in 1623 published a work in the Portuguese language, entitled "A Treatise on the Immortality of the Soul, in order to confute the Ignorance of a certain Opponent, who in Delusion affirms many Errors." In the course of the work the author plainly named Uriel, and described him as "blind and incapable." Da Costa thought his opponents, especially the rabbis, had hired Da Silva's pen to attack him. Hence he hastened to publish his work, also in Portuguese (1624-1625), entitled "An Examination of the Pharisaic Traditions, compared with the written Laws, and Reply to the Slanderer Samuel da Silva." The fact of his calling his opponent a slanderer shows his confusion, for he actually asserted what Da Silva had reproached him with, that the soul is not immortal. As he now had unequivocally declared his breach with Judaism, he had to take the consequences. Before, he had been openly scorned by young people in the street as an excommunicant, a heretic, an Epicurean (in the Talmudical sense); he had been pelted with stones, disturbed and annoyed in his own house (as he thought, at the instigation of the rabbis). Now, after the appearance of his work, the official representatives of the Amsterdam community complained to the magistrates that by denying the immortality of the soul, he had attacked not only the teaching of Judaism, but also of Christianity, and had published errors. Da Costa was arrested, kept for several days in prison, at last fined 300 gulden, and his work condemned to the flames. The freest state of that time believed that it had the right to keep watch over and limit freedom of thought and writing; its distinction was merely that it kindled no funeral piles for human beings. Da Costa's brethren in race could not have persecuted him very severely, for he was able to bear excommunication during the long space of fifteen years. Only his isolation was a heavy burden; he could not endure to be avoided by his family as one infected with the plague. Da Costa was not a strong-minded man, a thinker of the first order, who could live happily in his world of ideas as in boundless space, unconcerned about the outer world, and glad of his solitary freedom; he could not do without the world. He had invested his capital with one of his brothers, and he thought that it would be endangered if he continued the war against the community. He thought of taking a wife,