In this short booklet Sankara gives a practical guide to many of the problems faced by a seeker of truth, in the form of a series of questions and answers.
Those who die, merely suffering the woes of life like cats and dogs, are they human beings? The worthy are those who, even when agitated by the sharp interaction of pleasure and pain, are discriminating and, knowing them to be of an evanescent nature, become passionately devoted to the Atman. This is all the difference between human beings and animals.
-Swami Vivekananda