The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. 

P - 'Narcissus' is the pursuit of gratification from vanity or egotistic admiration of one's idealized self-image and attributes.

Q - As per this disorder, the individual overestimates his or her abilities and has an excessive need for admiration and affirmation.

R - Although most individuals have some narcissistic traits, high levels of narcissism can manifest themselves in a pathological form as a disorder.

S - The term originated from Greek mythology, where the young Narcissus fell in love with his own image reflected in a pool of water.