Be careful when power comes to thee also, lest thou too shouldst smite in thine anger or thy jealousy, for unconquerable strength is a sore weapon in the hands of erring man.
dcterms:bibliographicCitation
1886 October – 1887 January, H[enry] Rider Haggard, “The Spirit of Life”, in She: A History of Adventure, London: Longmans, Green, and Co., published 1887, →OCLC, pages 282–283: