(source) 
Nikolay Ivanovich Lobachevsky
(1 Dec 1792  24 Feb 1856)

Science Quotes by Nikolay Ivanovich Lobachevsky (2 quotes)
In geometry I find certain imperfections which I hold to be the reason why this science, apart from transition into analytics, can as yet make no advance from that state in which it came to us from Euclid.
As belonging to these imperfections, I consider the obscurity in the fundamental concepts of the geometrical magnitudes and in the manner and method of representing the measuring of these magnitudes, and finally the momentous gap in the theory of parallels, to fill which all efforts of mathematicians have so far been in vain.
As belonging to these imperfections, I consider the obscurity in the fundamental concepts of the geometrical magnitudes and in the manner and method of representing the measuring of these magnitudes, and finally the momentous gap in the theory of parallels, to fill which all efforts of mathematicians have so far been in vain.
— Nikolay Ivanovich Lobachevsky
There is no branch of mathematics, however abstract, which may not some day be applied to phenomena of the real world.
— Nikolay Ivanovich Lobachevsky
Quotes by others about Nikolay Ivanovich Lobachevsky (6)
The analytical geometry of Descartes and the calculus of Newton and Leibniz have expanded into the marvelous mathematical method—more daring than anything that the history of philosophy records—of Lobachevsky and Riemann, Gauss and Sylvester. Indeed, mathematics, the indispensable tool of the sciences, defying the senses to follow its splendid flights, is demonstrating today, as it never has been demonstrated before, the supremacy of the pure reason.
The full impact of the Lobatchewskian method of challenging axioms has probably yet to be felt. It is no exaggeration to call Lobatchewsky the Copernicus of Geometry,* for geometry is only a part of the vaster domain which he renovated; it might even be just to designate him as a Copernicus of all thought.
Mathematical theories have sometimes been used to predict phenomena that were not confirmed until years later. For example, Maxwell’s equations, named after physicist James Clerk Maxwell, predicted radio waves. Einstein’s field equations suggested that gravity would bend light and that the universe is expanding. Physicist Paul Dirac once noted that the abstract mathematics we study now gives us a glimpse of physics in the future. In fact, his equations predicted the existence of antimatter, which was subsequently discovered. Similarly, mathematician Nikolai Lobachevsky said that “there is no branch of mathematics, however abstract, which may not someday be applied to the phenomena of the real world.”
Copernicus and Lobatchewsky were both of Slavic origin. Each of them has brought about a revolution in scientific ideas so great that it can only be compared with that wrought by the other. And the reason of the transcendent importance of these two changes is that they are changes in the conception of the Cosmos. … Now the enormous effect of the Copernican system, and of the astronomical discoveries that have followed it, is … the change effected by Copernicus in the idea of the universe. But there was left another to be made. For the laws of space and motion…. So, you see, there is a real parallel between the work of Copernicus and … the work of Lobatchewsky.
Criticism of first principles which Aristotle and Ptolemy and Galen underwent waited longer in Euclid’s case than in theirs, it came for him at last. What Vesalius was to Galen, what Copernicus was to Ptolemy, that was Lobatchewsky to Euclid. There is, indeed, a somewhat instructive parallel between … Copernicus and Lobatchewsky.
Who made me the genius I am today,
The mathematician that others all quote?
Who’s the professor that made me that way,
The greatest that ever got chalk on his coat?
One man deserves the credit;
One man deserves the blame,
And Nicolai Ivanovich Lobachevsky is his name. Oy!
Nicolai Ivanovich Lobach…
I am never forget the day I first meet the great Lobachevsky.
In one word he told me the secret of success in mathematics:
Plagiarize!
Plagiarize,
Let no one else’s work evade your eyes.
Remember why the good Lord made your eyes,
So don’t shade your eyes.
But plagiarize, plagiarize, plagiarize —
Only be sure always to call it please “research”.
And ever since I meet this man, my life is not the same.
And Nicolai Ivanovich Lobachevsky is his name. Oy!
Nicolai Ivanovich Lobach…
The mathematician that others all quote?
Who’s the professor that made me that way,
The greatest that ever got chalk on his coat?
One man deserves the credit;
One man deserves the blame,
And Nicolai Ivanovich Lobachevsky is his name. Oy!
Nicolai Ivanovich Lobach…
I am never forget the day I first meet the great Lobachevsky.
In one word he told me the secret of success in mathematics:
Plagiarize!
Plagiarize,
Let no one else’s work evade your eyes.
Remember why the good Lord made your eyes,
So don’t shade your eyes.
But plagiarize, plagiarize, plagiarize —
Only be sure always to call it please “research”.
And ever since I meet this man, my life is not the same.
And Nicolai Ivanovich Lobachevsky is his name. Oy!
Nicolai Ivanovich Lobach…
See also:
 1 Dec  short biography, births, deaths and events on date of Lobachevsky's birth.