"Rock and Hawk" in Solstice and Other Poems (1935) 
Context: I think, here is your emblem
To hang in the future sky;
Not the cross, not the hive,
But this; bright power, dark peace;
Fierce consciousness joined with final
Disinterestedness;
Life with calm death; the falcon’s
Realist eyes and act
Married to the massive
Mysticism of stone,
Which failure cannot cast down
Nor success make proud.
                                    
        “Be calm in arguing: for fierceness makes
Error a fault, and truth discourtesy.”
    
    
    
    
        
        
        
            
            
        
        
        
        
        
        The Temple (1633), The Church Porch
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George Herbert 216
Welsh-born English poet, orator and Anglican priest 1593–1633Related quotes
                                        
                                        p, 125 
The History of Oracles, and the Cheats of the Pagan Priests (1688)
                                    
                                        
                                        Source: The Theory of Political Economy (1871), Chapter VIII : Concluding Remarks, The Noxious Influence of Authority, p. 220. 
Context: To me it is far more pleasant to agree than to differ; but it is impossible that one who has any regard for truth can long avoid protesting against doctrines which seem to him to be erroneous. There is ever a tendency of the most hurtful kind to allow opinions to crystallise into creeds. Especially does this tendency manifest itself when some eminent author, enjoying power of clear and comprehensive exposition, becomes recognised as an authority. His works may perhaps be the best which are extant upon the subject in question; they may combine more truth with less error than we can elsewhere meet. But "to err is human," and the best works should ever be open to criticism. If, instead of welcoming inquiry and criticism, the admirers of a great author accept his writings as authoritative, both in their excellences and in their defects, the most serious injury is done to truth. In matters of philosophy and science authority has ever been the great opponent of truth. A despotic calm is usually the triumph of error. In the republic of the sciences sedition and even anarchy are beneficial in the long run to the greatest happiness of the greatest number.
                                    
“From error to error, one discovers the entire truth.”
“Truth is an antidote against error. Error is the adultery of the mind.”
Heaven Taken By Storm
“It is in the nature of truth not to be at fault.”
Quoted in The International Herald Tribune (19 September 2005).
“If error is corrected whenever it is recognized as such, the path of error is the path of truth.”
“It is as much an error to take truth for lies, as lies for truth.”
Source: World of the Five Gods series, The Hallowed Hunt (2005), Chapter 8 (p. 134)
“Love truth, but pardon error.”
                                        
                                        Aime la vérité, mais pardonne à l'erreur. 
"Deuxième discours: de la liberté," Sept Discours en Vers sur l'Homme (1738) 
Citas