An objection holds that assent is a kind of knowledge and knowledge does not always arise at will. If clear evidence makes a truth apparent to the mind without choice, how can faith be the subject of an obligation?
The response distinguishes truth becoming known through evidence from the heart's acceptance and submission to that truth. On this account, the question concerns more than simply the involuntary appearance of knowledge.
This reasoning has limits: it does not imply that one can manufacture certain knowledge of any proposition merely by wishing to believe it.