Rabbi Kook said this quote

“ The realization that a decline in the moral state impedes the flowering of literature is a feeling unique to the Jewish people. Only we realize in truth that in order to improve the quality of literature, there is a necessary prerequisite, that the writers first cleanse their souls. We feel in ourselves the great need for penitence so that we might rise to the sublime heights of the noble literature that is uniquely ours, that stems from the wisdom of Israel, whose source is holiness and purity, faith and spiritual heroism.- Kook, Lights of Penitence, p. 118. ”