 Those who belong to the natural law tradition also hold that reason endorses acting morally. This sort of endorsement of course has a cognitive component. But it is also motivational. Aquinas does not hold that knowledge of morality is always effective: it can be blotted out by evil persuasions or corrupt habits. But if reason is not opposed by such forces, any rational person would not only know what was prohibited and required by morality, but would follow those prohibitions and requirements. So, for natural law theorists, endorsement amounts to acceptance.