“The tyranny alike of church and state has been curbed, and true power is now known to reside where forever it must remain — in the people.”

trans. Hollingdale, “Schopenhauer as educator,” § 3.3, p. 139
Untimely Meditations (1876)

1870s, Speech to the Society of the Army of Tennessee (1875)
Context: Encourage free schools, and resolve that not one dollar of money shall be appropriated to the support of any sectarian school. Resolve that neither the state nor nation, or both combined, shall support institutions of learning other than those sufficient to afford every child growing up in the land the opportunity of a good common school education, unmixed with sectarian, Pagan, or Atheistical tenets. Leave the matter of religion to the family altar, the church, and the private school, supported entirely by private contributions. Keep the church and the state forever separate. With these safeguards, I believe the battles which created the Army of the Tennessee will not have been fought in vain.

Source: http://www.friesian.com/quotes.htm Pennsylvania Gazette], Feb. 20, 1788.

https://www.newspapers.com/newspage/41022229, archived image from newspapers.com, Pennsylvania Gazette, Feb. 20, 1788 page 2 column 2

Dissent, Liggett Co. v. Lee, 288 U.S. 517 (1933), at 565-67.
Judicial opinions
Context: Through size, corporations, once merely an efficient tool employed by individuals in the conduct of private business have become an institution-an institution which has brought such concentration of economic power that so-called private corporations are sometimes able to dominate the state. The typical business corporation of the last century, owned by a small group of individuals, managed by their owners, and limited in size by their private wealth, is being supplanted by huge concerns in which the lives of tens or hundreds of thousands of employees and the property of tens of hundreds of thousands of investors are subjected, through the corporate mechanism, to the control of a few men. Ownership has been separated from control; and this separation has removed many of the checks which formerly operated to curb the misuse of wealth and power. And, as ownership of the shares is becoming continually more dispersed, the power which formerly accompanied ownership is becoming increasingly concentrated in the hands of a few... [and] coincident with the growth of these giant corporations, there has occurred a marked concentration of individual wealth; and that the resulting disparity in incomes is a major cause of the existing depression.

2012, Statement: on the Passing of His Father Rep. Salvador H. Escudero III

This appears to be a manufactured quote for a PBS documentary on the American Revolution, created by condensing, rewriting, and paraphrasing portions of a lengthy letter James Madison wrote to Thomas Jefferson on 17 October 1788 http://oll.libertyfund.org/?option=com_staticxt&staticfile=show.php%3Ftitle=1937&chapter=118854&layout=html&Itemid=27, about the need for a Bill of Rights and the danger of an establishment of religion. The resulting "quote" profoundly changed the import of what Madison was trying to say and uses modern English. The phrases "biggest danger" and "tyranny of the majority" aren't even in the original letter. The relevant portions of the original letter are (italics in the original; bold added for emphasis):<blockquote>"… In Virginia I have seen the bill of rights violated in every instance where it has been opposed to a popular current. Notwithstanding the explicit provision contained in that instrument for the rights of Conscience, it is well known that a religious establishment would have taken place in that State, if the Legislative majority had found as they expected, a majority of the people in favor of the measure; and I am persuaded that if a majority of the people were now of one sect, the measure would still take place and on narrower ground than was then proposed, notwithstanding the additional obstacle which the law has since created. Wherever the real power in a Government lies, there is the danger of oppression. In our Governments the real power lies in the majority of the Community, and the invasion of private rights is chiefly to be apprehended, not from acts of Government contrary to the sense of its constituents, but from acts in which the Government is the mere instrument of the major number of the Constituents. This is a truth of great importance, but not yet sufficiently attended to; and is probably more strongly impressed on my mind by facts, and reflections suggested by them, than on yours which has contemplated abuses of power issuing from a very different quarter. Wherever there is an interest and power to do wrong, wrong will generally be done, and not less readily by a powerful & interested party than by a powerful and interested prince. …"</blockquote>
Misattributed

Though this had been cited as being from a letter objecting to the use of government land for churches in 1803 https://web.archive.org/web/20061123043628/http://www.positiveatheism.org///hist/quotes/madison.htm#PHONYMAD, as quoted in 2000 Years of Disbelief: Famous People With the Courage to Doubt (1996) edited by James A Haught, no original source for this has yet been found.
Misattributed