Another phase of the same thought is brought out in "A Camel Driver," where the discussion turns upon punishment. The point is, if, as Ferishtah declares, the sinner is not to be punished eternally, then why should man trouble himself to punish him? Universalist doctrines are here put into the mouth of Ferishtah, and not a few modern philanthropists would agree with Ferishtah's questioners that punishment for sins (the manifestations of inherited tendencies for which the sinners are not responsible) is no longer admissible. Ferishtah's answer amounts to this. That no matter what causes for beneficent ends may be visible to the Divine mind in the allowance of the existence of sin, nor yet the fact that Divine love demands that punishment shall not be eternal; man must regard sin simply from the human point of view as absolute evil, and must will to work for its annihilation. It follows then that the punishing of a sinner is the means by which he may be taught to overcome the sin. There is the added thought, also, that the suffering of the conscience over the subtler sins which go unpunished is all the hell one needs. Another doctrine upon which the nineteenth-century belief in progress as the law of life has set its seal is that of the pursuit of happiness, or the striving for the greatest good of the whole number in which oneself is not to be excluded. With this doctrine Browning shows himself in full sympathy in "Two Camels," wherein Ferishtah contends that only through the development of individual happiness and the experiencing of many forms of joyousness can one help others to happiness and joyousness, while in "Plot Culture" the enjoyment of human emotion as a means of developing the soul is emphasized. The relation of good and evil in their broader aspects occupy the poet's attention in others of this group. Nineteenth-century thought brought about a readjustment of these relations. Good and evil as absolutely definable entities gave place to the doctrine that good and evil are relative terms, a phrase which we sometimes forget must be understood in two ways: first, that good and evil are relative to the state of society in which they exist. What may be good according to the ethics of a Fejee Islander would not hold in the civilized society of to-day. This is the evil of lack of development which in the long run becomes less. On the other hand, there is the evil of suffering and pain which it is more difficult to reconcile with the idea of omnipotent power. In "Mihrab Shah," Browning gives a solution of this problem in consonance with the idea that were it not for evil we should not have learned how to appreciate the good, to work for it, and, in doing so, bring about progress.