Career
According to Harold South. Bender, "much more time is spent on the exposition and defense of the author"s position as a Reformed theologian than on a statement of the Anabaptist position." The work is dedicated to his father-in-law, the Basel judge and envoy to the French court Abel Socin (1632–1695) and Abel Socin"s brother and burgomaster of Basel, Emanuel Socin. In the preface, Seyler writes that the Christian churches have never lacked enemies and persecutors, false teachers and erring spirits. He was matriculated at the University of Basel in 1656 and studied philosophy and theology, earned the degree Magister Artium in 1660 and was ordained as a Reformed priest in 1665.
In the following years he travelled extensively in France, Flanders, Holland and Germany.
Upon his return to Basel, he lectured privately on theology, until he was appointed as court preacher in Blotzheim in 1669, serving until 1671. He was a deacon at Saint Theodor"s Church in Basel 1671–1690 and Saint Peter"s Church in Basel 1690–1704, before he served as pastor at Saint Peter"s Church from 1704 until his death four years later.
He was the son of Magister Friedrich Seyler (1603–1676), parish priest and rector of the Schule auf Burg gymnasium in Basel. His mother Rosina Stöcklin (1612–1681) was the daughter of the Basel council member Matthys Stöcklin (1577–1649).
Abel Seyler (1684–1767), parish priest in Liestal.
Friedrich Seyler was the grandfather of the renowned theatre director Abel Seyler.