Hume took as his premise that the great diversity and disagreement regarding matters of taste had two basic sources - sentiment, which was to some degree naturally varying, and critical facility, which could be cultivated. Each person is a combination of these of two sources, and Hume endeavours to delineate the admirable qualities of a critic, that they might augment their natural sense of beauty into a reliable faculty of judgment. There are a variety of qualities of the good critic that he describes, each of which contributes to an ultimately reliable and just ability to judge.