 Others involved in the Collegiants were Daniel van Breen, Michiel Coomans, Jacob Otto van Halmael and the Mennonite Galenus Abrahamsz de Haan.Boreel was ordained into the Dutch Reformed Church, but broke away.In "Ad legem et testimonium" (1645), he argued the sola scriptura position that no religious authority other than the Bible should be acknowledged.