"The plain man is familiar with blindness and deafness, and knows from his everyday experience that the look of things is influenced by his senses but it never occurs to him to regard the whole world as the creation of his senses."
"Life can only be understood backwards but it must be lived forwards."Ernst Mach on Soren Kierkegaard
"The only source of knowledge is experience."Ernst Mach on Albert Einstein
"Experience: that most brutal of teachers. But you learn, my God do you learn."Ernst Mach on C. S. Lewis
"Experience is simply the name we give our mistakes."Ernst Mach on Oscar Wilde
"A man who carries a cat by the tail learns something he can learn in no other way."Ernst Mach on Mark Twain
"If our dreams were more regular, more connected, more stable, they would also have more practical importance for us."
"Physics is experience, arranged in economical order."
"The presentations and conceptions of the average man of the world are formed and dominated, not by the full and pure desire for knowledge as an end in itself, but by the struggle to adapt himself favourably to the conditions of life."
"Without renouncing the support of physics, it is possible for the physiology of the senses, not only to pursue its own course of development, but also to afford to physical science itself powerful assistance."