The narrator reflects on a time of contentment, feeling 'fat and happy' with his new responsibilities as he carefully observes the flock. During siesta, he enjoys peaceful moments in nature, finding shade by trees or creeks, which allows him to escape the rigors of his duties. This tranquility is not wasted; he engages in thoughtful reflection.
As he rests, he recalls the life of his previous master, who, unlike him, was caught up in the demands of others, constantly catering to their whims. This contrast highlights his current happiness and freedom compared to the life of servitude he once experienced.