The school had links to Gloucester Cathedral, and since he was obliged to teach his pupils according to the Catechism of the Church of England, he immersed himself in the study of the Bible.
[6] Biddle was strongly attacked by John Owen,[citation needed] in his massive work Vindiciae Evangelicae; or, The Mystery of the Gospel Vindicated and Socinianism Examined.
By exiling Biddle, Cromwell avoided a test case that could have put significant numbers of the sects at risk of prosecution.
[4] His body was "conveyed to the burial place joyning to Old Bedlam in Moorfields near London, was there deposited by the Brethren, who soon after took care that an altar monument of stone should be erected over his grave with an inscription thereon.
[18] He affirmed that the Bible was the Word of God and his Christology appears to be Socinian, denying the pre-existence of Christ but accepting the virgin birth.
[19] Biddle's denial of the pre-existence of Christ was the main target of works including Puritan theologian John Owen's A Brief Declaration and Vindication of the Doctrine of the Trinity (1669).