The most dangerous phrase in the language is, 'We've always done it this way.'
"The only real failure in life is not to be true to the best one knows."
It is easier to change the specification to fit the program than vice versa.
One of the strongest motives that lead men to art and science， is escape from everyday life with its painful crudity and hopeless dreariness， such men make this cosmos and its construction in the pivot of their emotional life， in ordered to find the peace and the security， which they cannot find in the narrow whirlpool of personal experience.