This is what the painter, the poet, the speculative philosopher, and the natural scientists do, each in his own fashion.
Albert EinsteinThe scientist finds his reward in what Henri Poincare calls the joy of comprehension, and not in the possibility of application to which any discovery may lead.
Albert Einstein[Kepler] had to realize clearly that logical-mathematical theoretizing, no matter how lucid, could not guarantee truth by itself; that the most beautiful logical theory means nothing in natural science without comparison with the exactest experience. Without this philosophic attitude, his work would not have been possible.
Albert Einstein