1840s, Past and Present (1843)
“Seek, therefore, thyself! But in finding oneself, does not one find one's own nothingness?… Carlyle answers (Past and Present, book iii, chap. xi.). "The latest Gospel in the world is, Know thy work and do it. Know thyself: long enough has that poor self of thine tormented thee; thou wilt never get to know it, I believe! Think it thy business, this of knowing thyself; thou art an unknowable individual: know what thou canst work at; and work at it, like Hercules. That will be thine better plan." …and what is my work? — without thinking about myself, is to love God…. And on the other hand, in loving God in myself, am I not loving myself more than God, am I not loving myself in God?”
The Tragic Sense of Life (1913), X : Religion, the Mythology of the Beyond and the Apocatastasis
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Miguel de Unamuno 199
19th-20th century Spanish writer and philosopher 1864–1936Related quotes
                                        
                                        Tabulae Votivae  (Votive Tablets) (1796), "The Key"; tr. Edgar Alfred Bowring, The Poems of Schiller, Complete (1851) 
Variant translation:[citation needed]
If you want to know yourself,
Just look how others do it;
If you want to understand others,
Look into your own heart
                                    
Introductio ad prudentiam: Part II (1727)
                                        
                                        "To Shakespeare" 
Poems (1851) 
Context: The soul of man is larger than the sky,
Deeper than ocean, or the abysmal dark
Of the unfathomed center. Like that ark,
Which in its sacred hold uplifted high,
O'er the drowned hills, the human family,
And stock reserved of every living kind,
So, in the compass of the single mind,
The seeds and pregnant forms in essence lie,
That make all worlds. Great poet, 'twas thy art
To know thyself, and in thyself to be
Whate'er Love, Hate, Ambition, Destiny,
Or the firm, fatal purpose of the Heart
Can make of Man. Yet thou wert still the same,
Serene of thought, unhurt by thy own flame.
                                    
As quoted in The New Dictionary of Thoughts : A Cyclopedia of Quotations from the Best Authors of the World, Both Ancient and Modern, Alphabetically Arranged by Subjects (1957) by Tryon Edwards, p. 510
“Man know thyself; then thou shalt know the Universe and God.”
As quoted in Fragments of Reality: Daily Entries of Lived Life (2006) by Peter Cajander, p. 109
Introductio ad prudentiam: Part II (1727)
                                
                                    “Once thou art wed, no longer canst thou be
Lord of thyself.”
                                
                                
                                
                                
                            
Fabulae Incertae, Fragment 34, 7.