“The expectations of life depend upon diligence the mechanic that would perfect his work must first sharpen his tools.”

— Confucius

Source: The Analects of Confucius:

Last update June 3, 2021. History

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Confucius 269

Chinese teacher, editor, politician, and philosopher -551–-479 BC

Ali book Nahj al-Balagha

Nahj al-Balagha

“Every physician, shoemaker, mechanic or educator must know his shortcomings if he is to do his work and make his living.”

Wilhelm Reich book Listen, Little Man!

Listen, Little Man! (1948)
Context: Every physician, shoemaker, mechanic or educator must know his shortcomings if he is to do his work and make his living. For some decades, you have begun to play a governing role on this earth. It is on your thinking and your actions that the future of humanity depends. But your teachers and masters do not tell you how you really think and are; nobody dares to voice the one criticism of you which could make you capable of governing your own fate. You are "free" only in one sense: free from education in governing your life yourself, free from self-criticism.

“Eternal life does not depend upon our perfection; but because it does depend upon the grace of Christ and the love of the Spirit, that love shall prompt us to emulate perfection.”

William Adams (1706–1789) Fellow and Master of Pembroke College, Oxford

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 210.

“A man must always live by his work, and his wages must at least be sufficient to maintain him. They must even upon most occasions be somewhat more, otherwise it would be impossible for him to bring up a family, and the race of such workmen could not last beyond the first generation.”

Adam Smith (1723–1790) Scottish moral philosopher and political economist

Source: (1776), Book I, Chapter VIII, p. 81.

“The ancients considered mechanics in a twofold respect; as rational, which proceeds accurately by demonstration, and practical. To practical mechanics all the manual arts belong, from which mechanics took its name. But as artificers do not work with perfect accuracy, it comes to pass that mechanics is so distinguished from geometry, that what is perfectly accurate is called geometrical; what is less so is called mechanical. But the errors are not in the art, but in the artificers. He that works with less accuracy is an imperfect mechanic: and if any could work with perfect accuracy, he would be the most perfect mechanic of all; for the description of right lines and circles, upon which geometry is founded, belongs to mechanics. Geometry does not teach us to draw these lines, but requires them to be drawn; for it requires that the learner should first be taught to describe these accurately, before he enters upon geometry; then it shows how by these operations problems may be solved.”

Isaac Newton book Philosophiae Naturalis Principia Mathematica

Preface (8 May 1686)
Philosophiæ Naturalis Principia Mathematica (1687)

“What is evidence to a man will depend upon those of his faculties whk at work upon the things which are presented as evidence.”

Henry Ward Beecher (1813–1887) American clergyman and activist

The Nature, Importance and Liberties of Belief (1873)
Context: Now, evidence to a man is that which convinces his mind. It varies with different men. An argument to a man who cannot reason is no evidence. Facts are no evidence to a man who cannot perceive them. A sentimental appeal is evidence to a man whose very nature moves by emotion, though it may not be to his neighbor.
So then, when men come to the investigation of truth, they are responsible, first, for research, for honesty therein, for being diligent, and for attempting to cleanse their minds from all bias of selfishness and pride. They are responsible for sincerity and faithfulness in the investigation of truth. And when they go beyond that to the use of their faculties, the combination of those faculties will determine very largely, not, perhaps, the generic nature of truth, but specific developments of it. And as long as the world stands there will be men who will hold that God is a God of infinite love and sympathy and. goodness with a residunm of justice; and there will be men who will believe that God is a God of justice with a residunm of love and sympathy and goodness; and each will follow the law of his own mind. As a magnet, drawn through a vessel containing sand and particles of iron, attracts the particles of iron but does not attract the sand; so the faculties of a man's mind appropriate certain facts and reject others. What is evidence to a man will depend upon those of his faculties whk at work upon the things which are presented as evidence.

“The successful construction of all machinery depends on the perfection of the tools employed; and whoever is a master in the arts of tool-making possesses the key to the construction of all machines… The contrivance and construction of tools must therefore ever stand at the head of the industrial arts.”

Charles Babbage (1791–1871) mathematician, philosopher, inventor and mechanical engineer who originated the concept of a programmable c…

Source: The Exposition of 1851: Views Of The Industry, The Science, and the Government Of England, 1851, p. 173; As cited in: Samuel Smiles (1864) Industrial biography; iron-workers and tool-makers http://books.google.com/books?id=5trBcaXuazgC&pg=PA245, p. 245