(source) 
G. H. Hardy
(7 Feb 1877  1 Dec 1947)

G. H. Hardy Quotes on Theorem (6 quotes)
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>> Click for 64 Science Quotes by G. H. Hardy
>> Click for G. H. Hardy Quotes on  Mathematician  Mathematics  Ramanujan_Srinivasa  Work 
I believe that mathematical reality lies outside us, that our function is to discover or observe it, and that the theorems which we prove, and which we describe grandiloquently as our “creations,” are simply the notes of our observations.
— G. H. Hardy
It is a melancholy experience for a professional mathematician to find him writing about mathematics. The function of a mathematician is to do something, to prove new theorems, to add to mathematics, and not to talk about what he or other mathematicians have done. Statesmen despise publicists, painters despise artcritics, and physiologists, physicists, or mathematicians have usually similar feelings; there is no scorn more profound, or on the whole more justifiable, than that of men who make for the men who explain. Exposition, criticism, appreciation, is work for secondrate minds.
— G. H. Hardy
The “seriousness” of a mathematical theorem lies, not in its practical consequences, which are usually negligible, but in the significance of the mathematical ideas which it connects.
— G. H. Hardy
The primes are the raw material out of which we have to build arithmetic, and Euclid’s theorem assures us that we have plenty of material for the task.
— G. H. Hardy
What we do may be small, but it has a certain character of permanence and to have produced anything of the slightest permanent interest, whether it be a copy of verses or a geometrical theorem, is to have done something utterly beyond the powers of the vast majority of men.
— G. H. Hardy
Young men should prove theorems, old men should write books.
— G. H. Hardy
See also:
 7 Feb  short biography, births, deaths and events on date of Hardy's birth.
 Godfrey Harold Hardy  context of quote Languages die and mathematical ideas do not  Medium image (500 x 350 px)
 Godfrey Harold Hardy  context of quote Languages die and mathematical ideas do not  Large image (800 x 600 px)
 Godfrey Harold Hardy  context of quote Young men should prove theorems, old men should write books.  Medium image (500 x 350 px)
 Godfrey Harold Hardy  context of quote Young men should prove theorems, old men should write books.  Large image (800 x 600 px)
 A Mathematician's Apology, by G. H. Hardy.  book suggestion.