I am firmly persuaded that among nations, weakness will never be a foundation for security.
Source, in full
Speech in the House of Commons (26 February 1816), quoted in George Henry Francis, Opinions and Policy of the Right Honourable Viscount Palmerston, G.C.B., M.P., &c. as Minister, Diplomatist, and Statesman, During More Than Forty Years of Public Life (1852), pp. 11-12