The true spirit of delight, the exaltation, the sense of being more than man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
By 'socialism' I mean a classless society in which the State has disappeared, production is cooperative, and no man has political or economic power over another. The touchstone would be the extent to which each individual could develop his own talents and personality.dwight macdonald
Simplicity is the touchstone in finding new physical laws. ... If it's elegant, then it's a rough rule of thumb: you're on the right track.
Calamity is man's true touch-stone.
The ultimate touchstone of constitutionality is the Constitution itself and not what we have said about it.felix frankfurter
Intelligent investment is more a matter of mental approach than it is of technique. A sound mental approach toward stock fluctuations is the touchstone of all successful investment under present-day conditions.benjamin graham
Calamity is man's true touchstone.
One never knows a man till he has refused him something, and studied the effect of the refusal; one never knows himself till he has denied himself. The altar of sacrifice is the touchstone of character. The cross compels a choice for or against Christ.