Starting from his 1653 publication Dissertationes Duæ he defended a non-literal interpretation of the Bible texts that were quoted by Voetius to prove the unscriptural nature of Descartes' Copernican beliefs, and tried to reconcile philosophy and theology.
Cellamare, Davide, "A theologian teaching Descartes at the Academy of Nijmegen (1655–1679): class notes on Christoph Wittich’s course on the Meditations on First Philosophy", Intellectual History Review, 30:4, 585-613[1] Cuno, "Wittich, Christoph" in: Allgemeine Deutsche Biographie 43 (1898), S. 631-635 [Online-Version];[2] Kai-Ole Eberhardt, Art.
Reformierte Theologie unter dem Einfluss von René Descartes, Göttingen 2018 (Reformed Historical Theology 47).
(ISBN 978-3-525-55283-4) Kai-Ole Eberhardt, Vernunft und Offenbarung in der Theologie Christoph Wittichs (1625–1687).
Prolegomena und Hermeneutik der reformierten Orthodoxie unter dem Einfluss des Cartesianismus, Göttingen 2019 (FSÖTh 164) Jacob Gronovius, Laudatio Funebris recitata post obitum [...] Christophori Wittichii [...], Leiden 1687.