“Every case that fell to him for opinion gave fresh occasion for the application of his principle that knowledge must precede understanding, and understanding should precede judging.”

Source: Speech http://hansard.millbanksystems.com/commons/1848/feb/22/expenditure-of-the-country in the House of Commons (22 February 1848).

Part 1.3 Rights of Man
1790s, Rights of Man, Part I (1791)
Context: There never did, there never will, and there never can, exist a Parliament, or any description of men, or any generation of men, in any country, possessed of the right or the power of binding and controlling posterity to the "end of time," or of commanding for ever how the world shall be governed, or who shall govern it; and therefore all such clauses, acts or declarations by which the makers of them attempt to do what they have neither the right nor the power to do, nor the power to execute, are in themselves null and void. Every age and generation must be as free to act for itself in all cases as the age and generations which preceded it. The vanity and presumption of governing beyond the grave is the most ridiculous and insolent of all tyrannies. Man has no property in man; neither has any generation a property in the generations which are to follow.

On Allah (God), as quoted in Doctrine of Sufis (1977) by Abû Bakr al- Kalâbâdî, as translated by A. J. Arberry, Ch. 5 p. 15

2000s
Source: [I, Isaac, Take Thee, Rebekah: Moving from Romance to Lasting Love, 2005, 9781418515812, http://books.google.com/books?id=lhWCB2v3UlQC&pg=PA43&dq=%22Unless+I+understand+the+Cross%22, 43]

The Essays Or Counsels, Civil And Moral, Of Francis Ld. Verulam Viscount St. Albans (1625), Of Judicature

No. 78
The Federalist Papers (1787–1788)
Context: There is yet a further and a weightier reason for the permanency of the Judicial offices, which is deducible from the nature of the qualifications they require. It has been frequently remarked, with great propriety, that a voluminous code of laws is one of the inconveniences necessarily connected with the advantages of a free Government. To avoid an arbitrary discretion in the Courts, it is indispensable that they should be bound down by strict rules and precedents, which serve to define and point out their duty in every particular case that comes before them; and it will readily be conceived from the variety of controversies which grow out of the folly and wickedness of mankind, that the records of those precedents must unavoidably swell to a very considerable bulk, and must demand long and laborious study to acquire a competent knowledge of them. Hence it is, that there can be but few men in the society, who will have sufficient skill in the laws to qualify them for the stations of Judges. And making the proper deductions for the ordinary depravity of human nature, the number must be still smaller of those who unite the requisite integrity with the requisite knowledge. These considerations apprize us, that the Government can have no great option between fit characters; and that a temporary duration in office, which would naturally discourage such characters from quitting a lucrative line of practice to accept a seat on the Bench, would have a tendency to throw the administration of justice into hands less able, and less well qualified, to conduct it with utility and dignity.

Hayek's Journey: The Mind of Friedrich Hayek (2003)

Source: Guide for the Perplexed (c. 1190), Part III, Ch.25
Context: It is not unreasonable to assume that the works of God, their existence and preceding non-existence, are the result of His wisdom, but we are unable to understand many of the ways of His Wisdom in His works. On this principle the whole Law of Moses is based; it begins with this principle: "And God saw all that He had made, and behold, it was very good" (Gen. i. 31); and it ends with this principle: "The Rock, perfect is His work" (Deut. xxxii. 4). Note it.

Journal entry, Gilleleie (1 August 1835) Journals 1A; this is considered to be one of the earliest statements of existentialist thought.
Variant translation: My focus should be on what I do in life, not knowing everything, excluding knowledge on what you do. The is key to find a purpose, whatever it truly is that God wills me to do; it's crucial to find a truth which is true to me, to find the idea which I am willing to live and die for.
Later variant: What I really lack is to be clear in my mind what I am to do, not what I am to know, except in so far as a certain knowledge must precede every action. The thing is to understand myself, to see what God really wishes me to do: the thing is to find a truth which is true for me, to find the idea for which I can live and die. … I certainly do not deny that I still recognize an imperative of knowledge and that through it one can work upon men, but it must be taken up into my life, and that is what I now recognize as the most important thing.
Later expression of such thoughts in a letter to Peter Wilhelm Lund (31 August 1835)
Variant translation: I must find a truth that is true for me.
1830s, The Journals of Søren Kierkegaard, 1830s
Context: What I really need is to get clear about what I must do, not what I must know, except insofar as knowledge must precede every act. What matters is to find a purpose, to see what it really is that God wills that I shall do; the crucial thing is to find a truth which is truth for me, to find the idea for which I am willing to live and die.