One party threatened to return to Romanism; another threatened to sacrifice the independence of Geneva and submit to Berne.
He stayed at Cassel till 1783, publishing in 1782 his Reisen der Papste, a book wherein certain leanings towards Romanism are visible.
While he was fundamentally at one with Luther in opposing both Romanism and Calvinism, his mysticism led him to interpret justification by faith as not an imputation but an infusion of the essential righteousness or divine nature of Christ.
(1860); Romanism and Rationalism (1863); Outlines of Apologetical Theology (1867); The Doctrine of the Presbyterian Church (1876); Unbelief in the i 8th Century (1881); Doctrinal Principles of the United Presbyterian Church (Dr Blair's Manual, 1888) .
In April 1622 Laud, by the king's orders, took part in a controversy with Percy, a Jesuit, known as Fisher, the aim of which was to prevent the conversion of the countess of Buckingham, the favourite's mother, to Romanism, and his opinions expressed on that occasion show considerable breadth and comprehension.