Ought implies can

“Ought implies can” names the Kantian assumption that a duty must be within a person’s power. In the account of sincerity, that assumption makes sincerity appear attainable precisely because it is demanded; the passage then argues that consciousness’s structure makes the demanded self-identity impossible.

The Principle and Sincerity

The principle enters as an implicit premise in the ideal of sincerity. To be sincere is defined as being what one is, and the language of duty and effort implies that a person can become sincere: if sincerity ought to be achieved, it must be possible to achieve. The principle thus gives moral force to the attempt to recognize and affirm one’s true self.

The Structural Objection

The argument rejects the premise on which that attempt depends. Consciousness is not what it is: it sustains its own being, but is never simply identical with being. Accordingly, the structure of “not being what one is” prevents any movement toward being wholly in-itself, or toward the fixed identity sincerity demands. This impossibility is not a hidden obstacle that greater effort might overcome; the passage describes it as the very stuff of consciousness, an enduring incapacity to constitute oneself as a settled thing.

Consequences for Self-Judgment

Whenever a person posits a judgment about what they are, the act of positing already surpasses that identity—not toward another fixed identity, but toward emptiness and nothing. The principle therefore cannot secure sincerity merely by treating it as a duty: the consciousness undertaking the task cannot become the stable object that task presupposes. This also unsettles both self-congratulation for being sincere and blame directed at another for failing to be sincere.

Introspection and Its Limit

The problem extends to conversation, confession, and introspection. A person may try to determine exactly what they are, resolve to be their true self, and search for ways to change; yet the effort risks constituting the self as a thing. Likewise, tracing the purposes and motives behind actions would posit causal determinism, treating the flow of conscious states as a succession. The passage thus exposes a tension within the principle’s application: a duty to become sincerely oneself presupposes a fixed self that consciousness, in the account given, cannot be.