Moreover, the tendency to revolt against mere tradition and authority was very much in the air since the Renaissance, and it affected young Jews as others. There was the tragic figure of Gabriel da Costa, or Uriel Acosta (1585-164o). A crypto Jewish refugee from Oporto, in Portugal, he settled in Amsterdam. He was opposed to the belief in immortality, and to various Jewish rites, on the ground that they were not Biblical. He was excommunicated by the Jewish authorities, recanted, then returned to the charge, was excommunicated again, recanted again under humiliating conditions, and shot himself. In his naturalistic out look he was a forerunner of Spinoza. Especially interesting for the understanding of Spinoza is the case of another Jewish doctor of Amsterdam—Daniel de Prado (d. 1663). He too was opposed to supernaturalism and traditionalism, and appears to have influenced young people to adopt similar views. He was persuaded to recant in the synagogue in 1656, but there was no material change in his attitude. The synagogue authorities tried to bribe him to go abroad, but he declined, and was excommuni cated in 1657. A contemporary poet, punster and protector of the faith (Isaac Orobio de Castro) wrote an invective in verse against de Prado as a philosophaster who led astray young stu dents, Jewish and non-Jewish. Some of the allusions in this invective most probably refer to Spinoza, the record of whose excommunication faces the page in the communal minute book on which de Prado's recantation is recorded. Some of the writings of Jewish authors of the period (Samuel da Silva, Manasseh ben Israel, Orobio de Castro, etc.) in defence of immortality, revela tion and tradition afford considerable evidence of the intellectual ferment in Amsterdam Jewry. And the religious leaders of the day were not particularly tactful or tolerant. They were alarmed by heresies which were at least as anti-Christian as anti-Jewish, and were afraid of giving offence in a country of which they were not yet regarded as citizens. This alarm shows itself in the attempt to bribe de Prado and Spinoza into silence. But they were also imbued with something of the intolerant spirit of the Inquisition, whose victims they had been. In 1640, they actually put the ban on Manasseh ben Israel for some trivial reason, though they rescinded it soon afterwards.
The views which brought Spinoza into collision with the synagogue authorities were essentially the same as those of Farrar, Acosta and de Prado. In conversation with other students he told them that there is nothing in the Bible to support the views that God has no body, that there really are angels (as distinguished from merely imaginative visions of them), and that the soul is immortal. He also expressed his belief that the author of the Pentateuch was no wiser in matters pertaining to physics or even theology than they were. These utterances were reported to the Jewish authorities, who after vainly trying to silence him with bribes and threats excommunicated him in July 1656. The fact of his excommunication was formally reported to the civil authorities—a gesture intended to absolve the Jewish community from all responsibility for Spinoza's heresies. And Spinoza was banished from Amsterdam for a short period.
There is no evidence that Spinoza really wanted to break away from the Jewish community. Such evidence as there is rather points the other way. On December 5,1655, he attended service in the synagogue and made an offering. In view of his impecuniosity, offerings must have been rare events for him, and it may be assumed that he also went to the synagogue after that date, certainly in March 1656, the anniversary of his father's death.
Shortly before or after his excommunication he also addressed an Apology (or defence of his views) to the synagogue authorities. Apparently he was not entirely indifferent to their opinions of him. Possibly if Manasseh ben Israel had not been away in London at the critical time, the whole storm would have blown over. As it was, tactlessness, mischief making, alarm and intolerance were in the saddle and rode for a fall. In his 24th year Spinoza stood alone, but unafraid, and uplifted by his destiny to become one of the great lights of humanity.