"Social Statics, or The Conditions essential to Happiness specified, and the First of them Developed" by Herbert Spencer, (Pt. II, Ch. 4 : Derivation of a First Principle, § 3), 1851.
Herbert Spencer (1883). “Herbert Spencer on the Americans and the Americans on Herbert Spencer, report of his interview, and of the proceedings at the farewell banquet of Nov. 9, 1882. [With] Appendix”