Must and ought

Must and ought distinguishes an imperative that takes effect as an unavoidable act from an ideal that remains impossible to fulfill completely. The distinction reframes the problem of Kantian freedom: the difficulty is not simply whether an agent has obeyed duty without some hidden incentive, but how a subject can bear an act whose freedom cannot be absorbed into ordinary experience.

The distinction and Kant’s compromise

The book approaches Kant’s limitation through Bernard Williams’s distinction between must and ought. In its reading, Kant’s ethical formulations confuse the Must with the Ought: they translate an imperative at the level of the Real, experienced as a hard “I cannot do otherwise,” into a Sollen at the level of an inaccessible symbolic Ideal, something toward which the subject strives but can never fully arrive. The error is consequential. What happens with the force of “I cannot not do it” is treated as though it were what can never be fully accomplished.

This reading presents Kant’s compromise as a failure to follow his own breakthrough to its furthest consequences. The ethical problem is not exhausted by an ideal rule set against an imperfect agent. It also concerns an act that takes place with an immediacy and force that exceed the subject’s ability to represent it as a choice among manageable possibilities.

Freedom and retrospective motivation

A free act, in this account, is abyssal and traumatic. Its difficulty is not that the agent can never prove that no hidden pathological motive influenced the decision. Rather, the act is so difficult to endure precisely because it is free. To make it bearable, the subject experiences it as if it had been conditioned by a pathological motivation.

The book connects this process to Kantian schematization: an act that cannot be schematized cannot be integrated into experience as it occurs. The subject therefore “pathologizes” it, supplying a motivational explanation through which the act can be made intelligible. Kant, the book argues, tends to misread this deeper difficulty—the burden of endorsing and assuming a free act—as the more familiar uncertainty about whether an apparently dutiful action was secretly motivated by self-interest or another pathological impulse.

The imperative restated

The distinction changes how the book reads Kant’s formula “Du kannst, denn du sollst!” It rejects the rendering “You can, because you must!” in favor of the more tautological “You can, because you cannot not do it!” The revised wording makes the imperative less like an ideal demand that the subject may approach without ever reaching, and more like the force of an act that, once encountered, cannot be avoided.

In this formulation, freedom does not mean that the subject can calmly verify the purity of a decision against every possible motive. It names the traumatic necessity of an act that cannot be fully assimilated, and the retrospective work by which the subject gives that act a bearable, apparently conditioned form.