“There can only be one wisdom. For if it were possible that there be several wisdoms, then these would have to be from one. Namely, unity is prior to all plurality”
De Pace Fidei (The Peace of Faith) (1453)
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Nicholas of Cusa 49
German philosopher, theologian, jurist, and astronomer 1401–1464Related quotes

“From modern thought to ancient wisdom the path would be short and direct, if one cared to take it.”
The Need for Roots (1949), p. 292
Context: Concern for the symbol has completely disappeared from our science. And yet, if one were to give oneself the trouble, one could easily find, in certain parts at least of contemporary mathematics... symbols as clear, as beautiful, and as full of spiritual meaning as that of the circle and mediation. From modern thought to ancient wisdom the path would be short and direct, if one cared to take it.

The Precious Garland, 5
trans. by Jeffrey Hopkins, "Buddhist Advice for Living and Liberation: Nagarjuna's Precious Garland" (1998), ISBN 1559398515
Major attributed works, Ratnāvalī (Precious Garland)

Letter to John Jay (15 August 1786) http://gwpapers.virginia.edu/documents/constitution/1784/jay2.html
1780s
Context: If you tell the Legislatures they have violated the treaty of peace and invaded the prerogatives of the confederacy they will laugh in your face. What then is to be done? Things cannot go on in the same train forever. It is much to be feared, as you observe, that the better kind of people being disgusted with the circumstances will have their minds prepared for any revolution whatever. We are apt to run from one extreme into another. To anticipate & prevent disasterous contingencies would be the part of wisdom & patriotism.
What astonishing changes a few years are capable of producing! I am told that even respectable characters speak of a monarchical form of government without horror. From thinking proceeds speaking, thence to acting is often but a single step. But how irrevocable & tremendous! What a triumph for the advocates of despotism to find that we are incapable of governing ourselves, and that systems founded on the basis of equal liberty are merely ideal & falacious! Would to God that wise measures may be taken in time to avert the consequences we have but too much reason to apprehend.
Retired as I am from the world, I frankly acknowledge I cannot feel myself an unconcerned spectator. Yet having happily assisted in bringing the ship into port & having been fairly discharged; it is not my business to embark again on a sea of troubles. Nor could it be expected that my sentiments and opinions would have much weight on the minds of my Countrymen — they have been neglected, tho' given as a last legacy in the most solemn manner. I had then perhaps some claims to public attention. I consider myself as having none at present.

“[A proverb is] one man's wit, and all men's wisdom.”
Remark to James Mackintosh on October 6, 1830, reported in his posthumous memoir, Memoirs of the Life of the Right Honourable Sir James Mackintosh, Vol. 2 (1836), p. 472 http://books.google.com/books?id=wHM4AAAAYAAJ&q=%22one+man's+wit+and+all+men's+wisdom%22&pg=PA472#v=onepage
Variant: [A proverb is] the wisdom of many and the wit of one.