The duties of kingship among the anthropoids are not many or arduous. … But Tarzan tired of it, as he found that kingship meant the curtailment of his liberty. He longed for the little cabin and the sun-kissed sea — for the cool interior of the well-built house, and for the never-ending wonders of the many books.
As he had grown older, he found that he had grown away from his people. Their interests and his were far removed. They had not kept pace with him, nor could they understand aught of the many strange and wonderful dreams that passed through the active brain of their human king. So limited was their vocabulary that Tarzan could not even talk with them of the many new truths, and the great fields of thought that his reading had opened up before his longing eyes, or make known ambitions which stirred his soul.
Among the tribe he no longer had friends as of old. A little child may find companionship in many strange and simple creatures, but to a grown man there must be some semblance of equality in intellect as the basis for agreeable association.
Edgar Rice Burroughs