He whose heart is not agitated in the midst of calamities, who has no longing for pleasures, and from whom (the feelings of) affection, fear, and wrath have departed, is called a sage of a steady mind. His mind is steady, who, being without attachments anywhere, feels no exultation and no aversion on encountering, the various agreeable and disagreeable (things of this world). A man's mind is steady, when he withdraws his senses from (all) objects of sense, as the tortoise (withdraws) its limbs from all sides.