This presentation outlines the religious, specifically the Muslim, background of the sanctity of life argument (SLA) in bioethics and its recent secular versions. It suggests a path towards the future of SLA by taking into account a widely neglected theological position in bioethics in general and specifically in SLA: negative theology. It further probes whether SLA is fundamentally a cataphatic (positive) theological position or whether an apophatic (negative) version of SLA is also possible.