The infinite wonders of the universe are revealed to us in exact measure as we are capable of receiving them. The keenness of our vision depends not on how much we can see, but on how much we feel. — Helen Keller Copy Share Image
Broadly speaking, the discovery of X-rays has increased the keenness of our vision ten thousand times, and we can now 'see' the individual atoms and molecules. — William Henry Bragg Copy Share Image
