‘In a clean spot,’ i.e., in a spot pure in itself, not owned or controlled by impure persons and untouched by impure things; having ‘established a firm seat,’ a seat made of wood or similar material, which is neither too high nor too low; which is covered with cloth, deer-skin and Kusha grass in the reverse order; seated on it in a way which promotes the serenity of mind; having the mind concentrated on Yoga; and holding the activities of the mind and senses in check in all ways—he should practise ‘Yoga’, i.e., practise the vision of the self for ‘the purification of the self,’ i.e., to end his bondage.