Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 450.
“Perseverance is the master impulse of the firmest souls, the discipline of the noblest virtues, and the guaranty of acquisitions the most invigorating in their use and inestimable in their worth.”
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 450.
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Elias Lyman Magoon 27
American minister 1810–1886Related quotes

“The nation is worth fighting for, to secure such an inestimable jewel.”
1860s, Speeches to Ohio Regiments (1864), Speech to the One Hundred Sixty-sixth Ohio Regiment
Context: It is in order that each of you may have through this free government which we have enjoyed, an open field and a fair chance for your industry, enterprise and intelligence; that you may all have equal privileges in the race of life, with all its desirable human aspirations. It is for this the struggle should be maintained, that we may not lose our birthright — not only for one, but for two or three years. The nation is worth fighting for, to secure such an inestimable jewel.

Original: (it) La generosità verso gli altri è un gesto di grandezza dell'anima. Un inestimabile valore umano e culturale.
Source: prevale.net

Section 139
The Passionate State Of Mind, and Other Aphorisms (1955)
Context: Compassion is probably the only antitoxin of the soul. Where there is compassion even the most poisonous impulses remain relatively harmless. One would rather see the world run by men who set their hearts on toys but are accessible to pity, than by men animated by lofty ideals whose dedication makes them ruthless. In the chemistry of man's soul, almost all noble attributes — courage, honor, hope, faith, duty, loyalty, etc. — can be transmuted into ruthlessness. Compassion alone stands apart from the continuous traffic between good and evil proceeding within us.

“Tea is a work of art and needs a master hand to bring out its noblest qualities.”
Kakuzō Okakura, The Book of Tea (1906), Ch. II.

As Quoted in The New Inquisitions: Heretic-Hunting and the Intellectual Origins of Modern Totalitarianism, Arthur Versluis, Oxford University Press (2006) p. 39.
Undated

As quoted in "Xi Jinping meets model workers" http://english.cntv.cn/20130501/102444.shtml in cctv.com English (1 May 2013).
2010s

“Virtue is the mistress of all things. Virtue is the master of all things.”
(6 August 1796)
1750s, Diaries (1750s-1790s)
Context: Omnium rerum domina, virtus. Virtue is the mistress of all things. Virtue is the master of all things. Therefore a nation that should never do wrong must necessarily govern the world. The might of virtue, the power of virtue, is not a very common topic, not so common as it should be.