 Boyle was aware that most believers held their belief on insufficient grounds (see BP 4:60, BOA §3.7.5, pp. 301–2), but felt himself fortunate in that sound philosophy showed that the religion to which he was born was the correct one. For Boyle, miracles (in particular the miracle of Pentecost) were a crucial factor in opting for Christianity. The Christian miracles, he felt, clearly bore the stamp of God upon them. There were, he agreed, other miracles or apparent miracles, but the miracles which purported to establish Christianity were neither false nor diabolical, and they were miraculous. Locke believed that “Mahomet having none to produce, pretends to no miracles for the vouching of his mission,” but Boyle was aware of the argument that the Koran itself is miraculous (in view of the disparity between it and what might reasonably be expected of its author in the absence of divine inspiration). He felt, not that this argument was inappropriate, but that it failed the test empirically: