“The operations of commerce are not confined to the material ends; that there is no more powerful agent in consolidating and in knitting together the amity of nations; and that the great moral purpose of the repression of human passions, and those lusts and appetites which are the great cause of war, is in direct relation with the understanding and application of the science which you desire to propagate.”

Addressing the Canada Club in Ottawa on 29 June 1945, after the United Nations Charter was finalized, as quoted by Louise W. Holborn (ed., 1948) in War and Peace Aims of the United Nations, p. 719

Source: The History of Sexuality, Volume 1: An Introduction

17 U.S. (4 Wheaton) 316, 415. Regarding the Necessary and Proper Clause in context of the powers of Congress.
McCulloch v. Maryland (1819)
Context: The subject is the execution of those great powers on which the welfare of a Nation essentially depends. It must have been the intention of those who gave these powers, to insure, as far as human prudence could insure, their beneficial execution. This could not be done by confiding the choice of means to such narrow limits as not to leave it in the power of Congress to adopt any which might be appropriate, and which were conducive to the end. This provision is made in a constitution intended to endure for ages to come, and, consequently, to be adapted to the various crises of human affairs.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 491.

Source: Europe and the People Without History, 1982, Chapter 1, Introduction, p. 5.

Source: Economics for Helen (1924), Ch. 1 : What is Wealth?

Source: Break-Out from the Crystal Palace (1974), p. 148

Lecture on "Electrical Units of Measurement" (3 May 1883), published in Popular Lectures Vol. I, p. 73, as quoted in The Life of Lord Kelvin (1910) by Silvanus Phillips Thompson

The Richard Dimbleby Lecture: Science, Delusion and the Appetite for Wonder (1996)