In his 1786 essay on the pantheism controversy, ‘What Does It Mean to Orient Oneself in Thinking?’, Kant implies that ‘the maxim of reason's self-preservation [Selbsterhaltung]’ is reason's first principle for orienting itself in thinking supersensible objects. But Kant does not clearly explain what the maxim or principle of reason's self-preservation is and how it fits into his larger project of critical philosophy. Nor does the secondary literature. This article reconstructs Kant's discussion of the principle of reason's self-preservation in ‘What Does It Mean to Orient Oneself in Thinking?’ It suggests that this principle is best understood as the discipline of pure reason. The principle of reason's self-preservation performs the same methodological function that Kant assigns to the discipline of pure reason. This principle establishes the rule of law in reason and subjects reason to its own laws. In so doing, it prevents reason's dialectical errors and also grounds reason's faith (Vernunftglaube), which in turn systematically conditions the practical use of reason.

In spite of its dominance, there are well-known problems with Rawls’s method of reflective equilibrium (MRE), as a method of justification in meta-ethics. One issue in particular has preoccupied commentators, namely, the capacity of this method to provide a convincing account of the objectivity of our moral beliefs. Call this the Lack-of-Objectivity Charge. One aim of this article is to examine the charge within the context of Rawls’s later philosophy, and I claim that the lack-of-objectivity charge remains unanswered. A second aim of this article is to examine the extent to which, despite Rawls’s express intention to avoid reliance on Kant’s moral philosophy, supplementing Rawls’s political constructivism with some Kantian elements, in particular Kant’s idea of a universal principle of right, not only addresses some of the issues raised by the lack-of-objectivity charge, but also does so without compromising the ability of the Rawlsian account to accommodate the pluralism of conceptions of the good, which he takes to be a fact of modern democracies. I argue for a revised justificatory methodology, which combines Rawls’s MRE and Kant’s Critical Method.